I voted for pc.
Although I also own a PS3 and 360, they both have nothing on my PC in pretty much every regard bar a few select games like Gran Turismo and Forza, which is pretty much all I got my PS3 and 360 for.... (damn you microsoft and sony and your platform exclusive games)
There are a few main factors for my choice tho
- The mouse + keyboard combination beats a gamepad and auto-aim hands down for skill factor + ease of use factor + feel factor.
- the upped graphical and CPU power + driver / hardware upgrades, hence the ability to future proof your game + use much higher res textures and the latest improvements in shaders / rendering techniques when they become available, not when i get my next console
- the ability to make my own maps and use them for personal use or spread them online
- the ability to actually change the game with an SDK and create my own mods which could be classed as totally new "games".
Take a look at Alien Swarm which is a mod from the urrrrr Unreal engine is it? or the HL2 engine? can't remember off the bat.
Its basically a remake of an old classic that a group of modders created thru an SDK and some time/skill.
Sorry but I cant do any of that on my 360 or ps3.....yet anyway