I mob flip, but can switch flip fairly well. It's annoying sometimes, but I'm comfortable with it.
Backside flips are mobbed too.
Over the years I've done every 180 flip trick besides frontside heel, just can't figure them out.
I usually don't try hardflips because I think they'll be illusioned if I land it, and I can't bring myself to settle for that.
Frontside bigspins.. never.
Crooked grind/nose grinds, I haven't tried nosegrinds all that much over the years but crooked just never worked for me. I taught a friend of mine how to do them though. 
put your back foot in the front 180 position, and your front foot way up there, like over the bolts with your toes hanging off, so that you can feel the ball of your foot chilling on the edge, pop, scoop and start turning like you're doing a 180, and at about 90 degrees, and instead of flicking off the end of your board like you usually would, physically roll the board over with your front foot and then get it out of the way, and then hope for the best.
also, when you're popping and scooping, you wanna sort focus on hucking the board forward in the direction you're going, or else it'll just fizzle out and you'll land 2 feet ahead of your board that's just spinning awkwardly on the ground
hope that makes sense, it seems like a weird tip, but it's one of few tricks I feel I understand well enough to give tips on