Depends on what gametype really, but I mainly play S&

.
For S&

:
Villa - I'm a rusher. This is a hard map to rush on.
Nuke Town - Too small, always campers in the houses.
Domination or other modes:
Cracked - Too many holes for rats to see from.
Firing Range - Spawning. Nuff said.
Array - Too much running.