The things I use my bucket for would probably make a lot of people have a heart attack.
I suspect that's true for me as well. Honestly, the main use I have for mine is as a dozer blade. I don't often have anything to load, but I have to push stuff nearly every time I get on the tractor.
I question the statement that "most" loaders have a self levelling function. My JD doesn't have it, and my little Koyker doesn't have it. I think that JD makes a loader similar to mine that has the function, but I can't remember ever seeing one. Maybe I am just ignorant, but isn't this a feature you would normally find on a bigger tractor? Doesn't it require an extra line? I'm not arguing; just asking.
My Koyker doesn't even have a float function. I know that at least some that they make have it but the model I have does not utilize it. It could be that my tractor has a flow rate too low to operate it. It isn't something I worry about because I seldom use the feature anyway. Like Jake said, I'd rather control the bucket myself. The manuals say not to back drag with the bucket extended more than half the stroke. I try to follow that unless I'm trying to smooth a very small amount of dirt that would put little pressure on it.