Miami...For the sole reason of Speed and Delko:drool:...Kidding...I like Miami because the story line is much more action packed. I mean in the original, which I also like, you see Grissom take out his gun only once. The first time you see Horatio Caine, in Cross Jurisdictions, he has his gun out and is entering his suspects house. I also like the sunnies and H's corny one liners. Also all of the characters are drop dead sexy and Miami is a very sexy city.
Vegas is a tie with Miami, the stories are darker and the characters are much more serious. Grissom is a bit stranger than Horatio, but his anti-social personality adds to the appeal to the show itself. Vegas is also a darker city, I love watching Vegas and than Miami and seeing the sheer differences in the shows.
As for New York, the only episodes that I have seen were cross overs with Miami, so I can't really make a decision about what I have and what I haven't seen. But in the single episode that I have seen I thought that it was interesting, so it is at the bottom of my list, if only because I don't know enough about it to make a distinction. Okay, I think this is long enough so...*Need4Speed* out!