As I never played Fallout 2, I'd like it.
Personally I wouldn't shed any tears if we saw it again, assuming we either visit a part of the city we didn't see in FO2 or the part that we saw in FO2 was done very well and true to how it was. But again, seeing as we've seen it before and New Vegas lore says it's just about the same conditions, I'd prefer a brand new and fresh place to visit.