Good Xbox 360 games Worth Buying OR PC GAMES?

Dragon Age I & II are by the same people as Mass Effect. I'm actually in the middle of the second one right now, and so far neither games have disappointed me (actually, I'm in love with them :P). It has demons in it, if that's what you mean by demonic. If you don't like demons, though, i wouldn't recommend it. It's still an awesome game, nonetheless. Fable 2 and 3 are also awesome, and as for decisions that effect the game, its one of the best in my opinion. Yes, the plot for Fable II is kind of meh-but once you get to the third game, it'll make sense and be worth it. Oblivion is also an awesome game, but your decisions don't have major influence on the outcome of the plot in my opinion. Not like Fallout 3 or New Vegas. The only other game I can think of is the Bioshock games, but it may be too linear for the games you've listed. Bummer you couldn't get into Fallout 3 or New Vegas-Fallout 3 is what sparked my interest in gaming. Most RPG games like these, now that i think of it, have something to do with Apocalypse..hmm. Anyways, I'm no gaming expert, but I hope I gave you some information. I'm trying to not give away too much of each game, so I;m sorry if my answers seem vague :/