I completely agree with the fact that people should call their hair whatever they want. But for me, I don't think I will ever refer to my hair as curly b/c it is not a curl, it is tightly wound into a coil. And yes, each separate bend of that coil is technically a curl, but I just prefer coil.
And for me, it makes me feel as though I'm trying to mimic the language of those with looser-textured hair instead of embracing the unique characteristics of my own natural hair.
When I hear curls I think loose curls. When I hear coils, bushy, kiny, afro (...) I think of big, beautiful and fabulous highly-textured African hair that is unique, set apart and definitely in a category of its own. So for me, I guess that is why I like to use the special words.
I would like to reclaim the words "kinky" and "nappy" back from the haters and use them as terms of endearment for my hair.
That's just my two cents though. I do enjoy hearing everyone else's opinion and appreciate the fact that we all hold unique perspectives.