So far I'm liking 3 over 2, honestly. 2 just feels weird to someone who's only played 1 and 3. Like, the balancing of stuff just seems so in-between. Like, grenades seem great in H1, and stickies seem great in H3, and they both seem shitty in H2.
That said, the majority of maps that were remade for Halo 3 aren't ones I really care for, especially Cold Storage. Also, another gripe: I hate how so many of H2A's maps are ones that have been done to death. I'd rather they remake a map that hasn't been constantly remade. Give it some variety.