[mine all mine]

When I think of bad driving habits it has to do with things like non throwing arm placement, dipping, swooping, rotating on the ball instead of the heal, unnecessary steps in run-up and footwork.

I don't think that the speed of your run-up is necessarily a bad habit, it is more a style of approach. If you watch videos on youtube there are plenty of people who have quick run-ups and people who have slow run-ups who explode at the last second. That is like how many putting styles there are

A bad habit I have is occasionally dropping my left shoulder (RHBH) during the "hit" causing the disk to come out with much more hyzer than I wanted.