I hate them, and avoid them at any given opportunity. It's odd because I don't mind speaking what I think to people in my class at school spontaneously within a lesson - I can debate with complete fluidity in those situations.
But when I'm told I have do a presentation on a certain date, or read a certain part of the textbook after someone else, I immediately start over-thinking and panicking. And then when I get up there my mouth goes all dry and I just get really panicky and it's not pleasant.
I find it's much easier to do them when you're doing it with even one other person. The other day in English I did one with a friend and we split the amount of talking between us and I didn't panic at all.