I am biased on small maps because im very CQC(not with the sword, with the AR)
BIG MAPS!
What ever happend to Death Island, that would be such an Eye-Popper to see in HD.
Infinity
Gephyrophobia
Waterworks( i mean.... we got WetWorks:) Stalactites on the Ceiling HELL YA!
Medium Maps:
Rat Race
Danger Canyon
Burial Mounds(Forgotten Map)
Terminal (OMG PLZZZZZ!!!!)
small maps:
I`d love to see Chiron again (Very interesting CTF or King)
Warlock(Halo2)Foundation(kinda the same) but make it to where you can get on the top middle structure(like if you super bounced)
Turf(Halo2) Favorite H2 map
Ivory Tower Favorite Map Ever
Elongation (Twin Hallways ALL DAY) but maybe something to protect the spawns
Backwash (Could be made VERY CREEPY)