~The Second trait is the hook profile needs to offer you enough real estate to actually tie a proportional facsimile. If the hook is too long it may only be appropriate for a very narrow genre of insects. If the hook is too short in gape, bite, shank, or bend, the materials used can inhibit the hooking potential. This is a bigger issue than you think and unfortunately not discussed enough among tyers.
~The Third Trait is what I call “hook mojo” in order for you to feel confident and actually use the fly on stream you need to have a good track record with a particular hook. You have to believe in it!
The TMC 212Y has always been very consistent in holding power and control in my experience. It offers the golden mean for proportion when it comes to gape and bite. If there ever was a Vitruvian Emerger Hook the TMC 212Y would fit the build.