Can't seem to roll away from a switch tre. I'm gonna go down to an 8.125 and see if that helps.
Haha. It's crazy that you're skating boards larger than that and even trying technical flip tricks. I'm super impressed.
As for tricks I'll never be able to do,
Switch or nollie 360 fips (I have varial flips both ways on lock, but the extra 180 is just too much.)
Regular 360 flips (have them fakie almost every try. I dunno.)
Backside flips
Fucking anything to fakie on transition. Pivots, blunts, ollies, anything.