I use my controller for pretty much everything besides typing and maybe originally moving my windows around to where I wanted them.
I also have a hotbar with all my classes on it for easy switching...but if I'm feeling truly lazy I'll just go into the gearset window and do it that way

Since I like to lean back while playing, it's hard for me to move my mouse on a pillow or something (my keyboard is long enough to reach my lap). Not to mention I started playing the game on my laptop and trying to play this game with a touchpad is nigh impossible.