Part of the fun about fly tying, for me, is making variants.
I will tweak a pattern to give it a slightly different look. A tweak can be major or minor, but can help attract trout
I don’t think it matters much for most waters. But, it has made a big difference for me when targeting highly pressured trout at the Swift. My theory is that trout at times will mouth a fly out of curiosity.
When making nymphs, ones that have worked for me include: