I liked the east coast, like in FO3. Mainly because I recognized a lot of the places, it added extra creepiness IMO.
Same, I live less than an hour away and Fallout 3 really struck me when I first played.
On the other hand I was born in California and do remember some of the locations in Fallout and Fallout 2. I also took a trip to Las Vegas for Thanksgiving (lol). I was pretty surprised how well they did things, not distance wise of course but you know... it was cool.
All I have to do is make a trip to Chicago
All in all I must say i like the west coast a tad bit better just because it actually makes sense, aka events/plots/time. But Fallout 3 is one hell of a game, really well done for a rand.
Decision: West Coast