I haven't voted in the poll because there isn't and "I don't care" option.
I have all sorts of hand tools, some handles have knurling of some kind, many don't. There are lots of different materials, mostly plastics and woods. As often as not the plastic handles have some sort of texturing, but usually the wooden handles have none of any kind and in fact they're often varnished. It seems to make little difference to the way I grip the tool, and I tend to take the view that if I have to grip it like there's a risk it will run away and hide then something is wrong and needs fixing. You need to be reasonably relaxed if you're work with anything for a long time, or you won't be nice to know. If the handle is too slippery then I'll probably just go over it with coarse emery cloth or wrap it with some tape or something like that. I can't remember the last time I did that, possibly it was on a shovel in the late 1970s. That was because it had steel bands running fairly high up the handle, and in the winter they were making my fingers very cold so I wrapped a few layers of tape around it to insulate it. I thought about doing that once for one of my Malaysian parangs, which has a copper ferrule which acts as a pretty good heat sink too. I guess it isn't a problem in the tropics. In the end I just used a machete instead.
I think I like Kraton best for handles on knives, it doesn't matter about any texturing to me. I don't like bolsters on any handle.
