Controller and Keyboard combo.

Most of the time, I'm using the controller, but I'll one hand it to activate skills like Jarring Strike or Simian Trash, since the window of opportunity is so small. I don't want to risk the action bar scrolling while moving to activate and then missing the counter.

Also, if I'm chatting, I'll use the keyboard to keep the action moving.

I think the controller interface (the current UI) is great for what it is, but I do agree that a KB/M UI needs to be implemented for users in that demographic. It doesn't make sense why they don't have one by now.

Of course, I grew up on consoles, and always prefer a controller option. I'm saddened some other PC games (not MMOs) don't have the option...I'm looking at you Dragon Age.