Out of everything you listed sales are the worst indicator, and I never said every game that sells poorly is great, at the most I've said every game that sells great isn't nearly as good as some that have sold significantly less and I disagree with there being no accurate way to measure what is good, as long as you keep it within the genre's it's not even that hard it's not that hard to make a certeria of what makes a good 2D platformer or a good rpg, there will always be sub genres and differences of course but it's not impossible by a long shot 

That isn't what I said at all(especially the part you bolded(and PS I actually don't own and SH or RE games yet I imported Blood Siren from Japan))

 A bad game won't go on to sell millions and millions. However a good game can easily go and do that. Word of mouth is a powerful thing

That's a basic gist of the part you bolded...

Basic logic would dictate that: IF product A sold one million units and product B sold one thousand units, then it product A was generally more appealing to consumers and thus an overall better product when most other factors are the same (price, etc).

Even if ps3 has more overall sales on exclusives, it's not translating into more people buying the system than the 360.  They're not moving systems the way 360 exclusives do.  Sony dominated last Gen by a lot, it wasn't even close, but they have dropped the ball this Gen by letting Microsoft back in the race and dominate the market with the most buyers, the U.S.

You made a very valid point there.

And to slowmo, be careful by not trying to put words into people's mouth to prove a point.

And here's something else. Before the interwebs exploded, did gamers NOT enjoyed playing games because they did NOT have easy access to sales figures?  Did gamers once go around saying, "I just bought this game, and I don't know if I'm going to enjoy it.  I don't know how many copies this game sold."  Or, "I enjoyed playing this game when it sold 1.2 million copies a while back.  Now, it's sold 2.7 copies.  Because of that, I now remembered enjoying that same game over twice as much."  Or how about, "Now, that I found out that the game you played sold more than the game I played, the game I played just isn't as good as when I played it anymore."  I detect that there is something inherently wrong with the person the OP is in reference to amongst others.

Everyone I know bought a 360 because it was cheaper and they wanted to play multiplats, it's not the exclusives thats selling the 360 or atleast not the biggest reason, if ps3 was the same price as 360 when it launched 360 wouldn't have more sales now 

So you're saying because you cannot quantify what makes a game good the other persons arguments aren't accurate.  This seems to be more you being pedantic to try and squirm out of an argument rather than actually accepting the facts at hand.  If that person has sales, reviews and general opinion on their side then you've lost if you cannot rebuke those facts.  I agree that a game that sells 10 million isn't necessarily a better game than one that sells 5 million.

The fact still stands though that it is the majority that decide the quality and from this standpoint any game aimed at a minority demographic can never be better in most peoples eyes.