I don't like the Black Ops 2 maps MORE than the first Black Ops maps, but it's nice to have new maps to play on. I was starting to get tired of playing on the Black Ops 1 maps. As for my favorite on Black Ops 2, I think it's called Raid.
Hijacked is the one on the yacht, right? That one is a bit tight for my taste. I'd say my favorite map is Nuketown 2025. I was actually kind of surprised that my copy of the game came with that map, because I thought it was only available to people who pre-ordered.