Well, I would recomend to you Call of Duty: World at War for the Xbox360 if you like older war type games like World War 2. If not, then try Halo 3 or Gears of War 2 for the Xbox360 if you like humans fighting Aleins. One last suggestion, if you like Modern type gun games or sports games try one or more of the following. Sports: Madden 09 (football), NHL 09 (Hockey), NBA 09 (Basketball), or MLB 2k9 (Baseball). Modern Gun: Call of Duty 4, EndWar (It's actually a future gun game), Rainbow Six Vegas 2, or Soldier of Fortune: Payback (I don't really like it that much I just used it for achievments). I chose the Xbox360 because it has the best graphics and everything like that, if you're going to buy a console buy the Xbox360.
Dang you ShintetsuWA! You beat me to it. Yes, if you have a good PC get Fallout 3. Sad that your dog companion died, quest glitched so you cant finish, NPC fell through map on 360? Too bad. Sad that your dog companion died, quest glitched so you cant finish, NPC fell through map on PC? enter a console command to resurrect him, reset the quest, move the NPC back to the map. Also when your bored, you can go godmode and destroy everything.