I use some stuff more than others, but I can't say there's anything I won't use. I have some vinyl tubing that I don't use a lot of other than one specific fly I tie (dry fly on scud hook, parachuet style with the ribbing for a body, essentially a midge kind of).

There are colors I use more than others (I use a lot of brown and grizzly for Adams, and black and olive for warm water flies like woolie buggers). I use a lot of silver and gold tinsel for minnow imitation flies.

I can't think of anything I "never" use (there's a lot of stuff I don't have but the stuff I've bought/traded/been given, I use).

Jeff