This is the first time that I will write something over here at this fly tying forum.
I'm from Europe (The Netherlands) and I want to show you one of mine favourite nymphs.
On local water catches this nymph mostly roach and European perch.
Friends who fished with it on trout rivers in Germany caught sometimes a lot with it, and they couldn't catch fish with other flies or nymph's. It's a very simple pattern: I use only for this nymph a shrimp hook 14-18, a small glass bead, a peacock's hearl, and some "madeira" wire.(Madeira wire can you buy in a hobby store for needlework)
I hope for you that you'll catch your dream fish with it.
Good luck with it!