Fallout 3 and New Vegas. I've lost more hours of my life to these than anything else I've played on PS3. On the surface, they appear to be fps's, which I generally hate unless we're talking about halflife. However, they're actually more like first-person action rpg's. The "VATS" combat system makes fighting really fun, gaining experience never feels like grinding, and the storyline is really cool though you can do any number of side-quests at any time. The choices, dialogue and otherwise, can affect your karma, which ultimately play into who is willing to join you or work with you, and what storylines can become available. /nerdout