Crossfire is probably my favorite, due to the more open air feel of the map, with fewer things to hide behind and a huge number of ways to attack/defend. It's the only map I'll play a sentinel on.
Raindance is probably my least favorite, or at least my love/hate map. I love being able to solo defend the generator as a Raider with a Jammer pack, but I hate having to face similar defenses due to how awkward it is to get into the generator room. Also, for capping, the way it's set up can screw you over if you hit the edge of the tower with the flag by just a tiny bit (I've seen some pathfinders launched into low orbit because they hit it just right), and it feels entirely too easy to focus static defenses around something that is elevated with few easy routes to get to and little to no chance of your generator being taken out for any amount of time.
Katabatic probably comes in at a close second for my favorite maps. Temple Ruins is okay, if only because I've gotten good fast caps from those hills in the middle separating the two bases with minimal effort, and the little ramp leading to the upper area makes me feel like Sonic the Hedgehog if I either cap it from there, or cap while going there and shoot out the top.
Don't really like or dislike the other maps. They have the good and the bad associated with them. They really need more maps though, rather than "BUY ME NOW" skin packs.