I've clicked since vanilla and don't plan to stop. Until I tell people in the guild I'm a clicker they would never guess, considering I parse in the 90%+ range. It's how I learned, and I'm good at it. Buttons are all set up as a flow chart. I actually make fun of the key binders who give me crap in the guild when they can barely parse above 50% most of the time.
Play how you like to play, whatever is the most comfortable. It is a game after all.