Gaps bigger than off the ledge. Rolled my back ankle really bad the first time I ever tried to Ollie a gap, and never recovered mentally from it. It's weird, I can jump on a decent sized skatepark rail no problem, but no way I'd try to Ollie that same set.
Back tails are another one. Either it just sticks or I slide out with no control and slam knees and face first to the ground. Can do a ssfsns and fakie bs tail pretty well though
Blunt to fakie and bs pivot to fakie on tranny are fucked