Favorite: Auto-crossbow - something about the animation and sound effect makes a very satisfying button to press. I wish that the regular AoE was that instead of Spread Shot, tho. The latter is so underwhelming and even a little weird for a weapon that is clearly not that kind of firearm.

Least favorite: Improvisation - so sad that the big level 80 ability for Dancer has such a limited use. I would expect something that you're very excited to use when it comes off cooldown.