As a PC gamer (since 03), who has a ps3 and ps vita on the side, i can honestly say the main advantage of pc gaming is the ability to move forward. The consoles stagnate somewhat and offer little excitement.
Dont get me wrong, my ps3 (since 08), is a good piece of kit and at the time i bought it, i was hooked but it fizzled out as the games visuals and variety stagnated into the same pretty much.
The reason i have the ps3 and ps vita even though im a 'pc gamer' is they are they to offer what the pc cant, which is exclusives which the ps3 does a good job with and almost console like graphics on the move which is where the ps vita comes in.
But yes, i hear, you still think its not worht the price tag, you might be right, BUT, it cost more but thats because you get alot more in return, which is pc quality, graphics and better multiplayer. Company of heroes, battlefield 3, formula 1 2012, half life, css, warhammer dawn of war, planetside 2, wow, star wars tor, hell even the cod series etc etc all superior on the pc. Personally its not very common to see a poor console port to pc.
When i really think about why i dont play console really anymore its because...it has no depth to it, just generic setup same as everyone else which is outdated, and the whole console multiplayer is for the most part a let down because of the lack of people per online game which is boring when you can have double or triple that on its pc counterpart.