I'm slowly getting into it more but it doesn't make it easy, FO3 just seemed to have more character from the get go. Perhaps it's just the reuse of textures, objects, etc without any attempt to introduce something new (so far) and the whole thing feels like a cash-in.
I'm just not drawn into it at all so far but I'm going to keep trying if only because buying the game over here in NZ cost a small fortune.
I wouldn't say it's terrible but they are almost banking on you remembering how great FO3 was in order to keep you playing at the moment, it's hard to see how anyone new to the series would get what all of the fuss is about so far.
Fingers crossed though, I was pinning my hopes on this seeing my through until Black Ops!