i tried the 360 demo. i enjoyed it and decided to buy the game but i tried the PC demo first to see if i'd prefer that. hands down the PC version takes it for me. bought it that day. the mouse just gives you so much more control over your character than the sticks do (i.e. ability placement).
for people who still play on PC and want someone to play with i'm down. i already roll with a friend of mine and we could use a couple more peeps.