I'm a fan of all 3 really, theres certain games I just cannot play on some formats for example, I cannot stand fps games on the handheld (such as CoD 3 on psp) because they plain suck at giving me the control I need. I cannot play strategy games on my 360 because with the exception of Halo Wars and Civ Rev (minus the next 360 controller part for civ) which was custom built for the 360 controller, the console sucks at giving me the precision I like in controlling such games, I also feel the best Strategy games come out on pc, Dawn of War 1 and 2 and so on.

I prefer consoles for pretty much everything else and also being a complete achievement whore (yeah I know I fell in to the trap, though I don't just buy/play games for the achievements I prefer to get the games I want to own and then 100% them) which means the xbox 360 achievement system keeps me buying games I want on the 360 over other formats. I do however play PSX games on my laptop since my memory card for the psx died years back. I also am considering buying a pc version of oblivion for the fact that I want to mod the game some and cannot do it on the 360.