I'm currently playing Fallout: New Vegas. About 30 hours in with my first character (and a few hours with my second), I so far find the game quite enjoyable, but the "Old World Blues" DLC is somewhat unfair. I have skilled my character to be a great talker who is also good at hacking Terminals and picking locks, but he sucks at fighting. In the main game, I did quite well with this character (with a little help from Boone). Now, Old World Blues gives me robots, cyborg dogs, robo-scorpions and ax crazy people with no way to avoid them. On the other hand, I think this DLC will be fun with my second character (who is skilled to be an outstanding combatant with little to no social skills).