I've never gone to a crossfit gym and typically do a combo of powerlifting and Street Parking on my own these days. So there are a lot of movements in the crossfit canon that I don't do. I don't do most high skill movements, so a lot of gymnastics and Oly lifting is out for me. No handstand walks, handstand pushups, muscle ups, or rope climbs, and I need to modify pull ups. I clean with a barbell but I've never snatched one.
I'm interested in learning some of these things. Snatching looks fun, and I'd like to be able to kick up to a handstand and do a pull up. Maybe someday I will learn these things. I'm cool with my low skill fitnessing for now, though.