I cant really tell if you are being sarcastic or not ...... ¬_¬

The worst thing an industry can do is blame the consumer for not buying their crap. Obviously Sony's games don't appeal to the masses. Every Sony console has been dominated by third party software, the problem with that is third parties aren't loyal in the least.

Its not as simple as 'get a mascot like Mario' a mascot alone isn't enough, Mario games don't sell simply because Mario is on the cover, but for decades Mario represented quality, especially to the old school gamer or those that grew up with Super Mario Bros.

Variety is the spice of life Uncharted or GoW are good to have, but they won't do much for expanding Sony's audience, GT used to be a game on Par with a Halo, but that is no longer the case. Maybe the games aren't selling as well as they should because the games aren't as good as they should be.

Also, the Mario bros cartoon wasn't made in order to make Mario big, Mario was big so the cartoon was made.

I'm for real -_-

anyway, I'm adding you on PSN if u dont mind, u have a high level, I'm lvl 18 :D

I can think of 3 main reasons

1.)The difference between Sony and Nintendo IPs or Halo is their approach to game development.
When Nintendo has created Mario, Zelda, Mario Kart or Smash Bros they were proposing an original game concept (or they have re-defined a particular genre) in search for an audience. In other words with Mario/Kart/Smash etc. they have "created" (or "found") a new audience for the specific kind of game.
In they same way, when Microsoft proposed Halo they have created a new audience for online FPS gaming on consoles. And, in the same way, when Sony proposed Gran Turismo they created a new audience for driving simulators. In fact both games have a huge success.
On the other hand, when Sony releases games like Mod Nation, Killzone, Resistence, All-star battle royal they aren't going for a new audience, but they're trying to steal (or to conquer) a share of an audience fed by some other game.

2.)Another very relevant reason is the general target audience, Nintendo most succesfull IPs are made for everyone (child/young/adult male/female) while most of Sony IPs are too gore to be considered appropriate for childrens and, at the same time, to juvenile to be considered appealing to the adult (I think of God Of War, Twisted Metal and Infamous).
You can take Gran Turismo again as the opposite example, GT can be played by everyone kids love cars, youngs love cars, and also adults love cars. And, as a matter of fact, GT is Sony's most succesfull IP.

3.)At last, Sony hasn't learned very well yet that multiplayer sells games and sells consoles.
WiiSports, Mario Kart, Smash Bros have sold tons due to local multiplayer. Halo and Call Of Duty have sold tons because of online multiplayer. That said, where is Sony's multiplayer killer app?

You make a good point about audience appeal, but Sony's exclusives have been among some of the highest quality exclusives this gen.

Funny how you think God of War isn't endearing enough for gamers when it has by far the largest fan group out of all of Sony's franchises. 

It has 2.66 million fans VS the second largest PS exclusive fan group at 1.71 million for Gran Tursimo. (Facebook fan groups). So going by the amount of actual fans God of War is the most endearing Sony franchise contrary to your insignificant opinion that only the ill-informed minority would share.  

Trying to make God of War sound unpopular is hilarious, it has more dedicated fans than any of Sony's other franchises, just a quick look on the internet you'll see hundreds of people with God of War related tattoos, there's more fan merchandise for God of War than any other PS IP and the games sell amazingly well considering the target age range and that it's in a genre that isn't very popular at all aside from God of War. No one really knows how well the games have really sold as Vgchartz isn't 100% correct and they don't track digital sales. GOW 1 & 2 probably did pass 4m and 3 is probably really close to 5m, but the accurate prediction would put the franchise at around 20+ million units sold in 7 years and with the most amount & most dedicated fans so how you can have the audacity to call GOW 'uninteresting' and not 'endearing' and then go on to mention 3 other franchise that are nowhere near as beloved, that's just stupid logic. 

God of War is by far the best-selling, most beloved AND most critically acclaimed franchise in its genre, can the same be said for Uncharted/R&C/Crash etc? No, it's either one of the other with those franchises, so bad mouth GOW all you want it won't change the facts.

mmm....ok but put on the message that you are from here.

I think its more to do with saturation markets and no clear superiority.

Nintendo makes THE best platformer, brawler, kart race, zelda-type, party games, etc of games there are.

These games are considered the best of the bunch and therefore sell extremely well.

Sony's first party, while generally technically good games, are not the cream of the crop.

Killzone is about as good as Conduit... save for online play which is 100% Nintendo's fault and not the games.
Uncharted is no better than Assassin's Creed or Batman or many other adventure games.
GT is comparable, though maybe better slightly, to Forza or other simulation racers. (However this is the closest Sony has to a top of the class game)
God of War is no better than or worse than IMO AC/B/others.

Frankly, their titles just don't stand out in the crowd in almost every case. The only game I'd give props to, to being uniquely different and top class would be their platformer LBP. Its not the best platformer alive as that belongs to Mario, but the creativity it adds and virtually endless alterations of platforming, do make it a top tier game. But they do need to revolutionize it better in the next iteration.

In reality this thread and overall argument goes into the idea of why Sony cannot exist solely on its own software. I've made that comment multiple times and its easily proven by looking at the sales history of Sony's first party titles on any of its consoles. They are always dwarfed by 3rd parties in the same genre.

But, I'd also agree that marketing their big franchises in other mediums would significantly help. Sackboy, Drake, Kratos, etc... all have potential. Especially considering the content Sony owns in music and video. You'd think they would have already done this.

if the reason isn't diversity then it's wrong

But good quality doesn't mean that it's mass market appealing, games like Okami are critically acclaimed but unless you talk to someone who has good amount of knowledge in video games chances are they haven’t heard of the game. This is Sony’s greatest weakness with their IP’s, they are generally aimed at one target audience (Young teens GoW, Killzone, Infamous and Uncharted more or less) and struggle to hold the attention of everyone else. One of the big exceptions would be the Ratchet and Clank Series which appeals to different age and sex demographics, but as we seen with the sales it’s too late to market the series the way you want it. The only franchise with enough following and demographic broadness at the moment is LBP, chances are if they did a show they would follow guidelines Viva Pinata’s show did. Outside of LBP you have Uncharted which works as a movie but not a TV show, Infamous comics really is the only area it could do well in, GoW......hentai (I can’t think of anything at all so hentai it is), Twisted Metal....hentai again, Sly could work as teen aimed tv show but needs to gain more popularity before doing so. Oh and Fat Princess Hardcore Porno it could work there’s a market for every kind of fetish...