I won't play FPS/RTS games on the console. The mouse is the only way to go...anyone who says different obviously has not played a FPS/RTS on a computer.
I'll admit that the FPS console games have come leaps and bounds since Goldeneye and their grid point aiming system, but it is still a grid and some games even still use an auto-correct system for your bullets so you don't get mad that you can't aim perfectly.
Adventure/RPG/Sports/racing games have always been my choice though for console and it feels like you need a controller to play these games.
Fortunately, the PC has come leaps and bounds and I can now use my 360 controller on my PC.
PC games have not completely died either...here are some titles that have come out or are coming out in the next few months that I want to play.
Empire:Total War
Battleforge
C/C3 new expansion
company of heroes new expansion
Football Manager Live
Elven Legacy
Men of War - although I'm about burnt out on WW I/II video games right now.
We could argue forever about console vs PC, but hands down PC owns console in these fields: mods, online play, and the ability to play something that you didn't pay for and not be banned forever from the network. LOL