I can tie a PT nymph that I think is pretty good (not bragging, though). It's a simple pattern, but I'm still not very happy with my Hare's Ear nymphs. I've tied way more PTs than anything, and I think it takes a while to learn the little tricks that work for you.

One pattern I'd like to be able to tie well is a muddler minnow. And I'd like to be able to tie a good Parachute Adams. But it takes a while to figure these things out.

Is everyone else like that? Are there patterns that you'd like to be able to tie well, but haven't got it down yet?