I just got DSL and I DLed Fallout off of gametap. I've only played the beginning thus far. I don't like how slow it is, but I certainly see how it could be a tactically oriented game. It would be a load more fun if I was commanding a squad to fight baddies, but I know this is an RPG and I'm not going to expect something it shouldn't have. The UI is clunky and, to me, counter intuitive (and I shake my hand at game tap for lack of manuals which makes learning the UI that much harder), but I do think I'll learn it soon enough with experimentation.
I've not gotten to far into the story yet either, so I won't comment on that. But I did like the voice overs so far, as well as the graphics, however dated they are.
All in all, I believe I'll have fun with this game. It'll certainly make for a great laptop game for travelers.
And the idea just hit me: Has there been any talk about porting Fallout onto the Nintendo DS? People have done that for other games like Doom, Descent (Interplay, ftw), etc. So Fallout?