I'm with Skip on his choice of maker. Most of what I tie lately is smaller than normal and I use 140 denier because I find it easier to hide. The fish don't care but I do. I have some 70 for when I tie flies, but I'm heavy handed and it will break easy if you don't pay attention. Uni will do if you can't find any other, and it's quality is good , but Danville is my preference. If you like the Gray Ghost a lot of us tie, be sure to get some gray thread for that. A good finishing touch is to not see the thread on those. And I'm still learning too.
Creativity is just intelligence fooling around