1) American Kenpo Karate
2) Yes! but it is some what infrequent
3) Medium mostly. I did full contact with my Sensei a couple of times....boy did I hurt!
I really like sparring, as we all know, sparring is what helps us sharpen and hone our skills! One needs sparring as well as technique work, foot work, and time allotted for forms/kata. It really shows in your karate if you don't devote sufficient amount of time doing either one of these.
Watch out for Mcdojos if you mention the S word (sparring) it will make most "Masters" take another S word (not sparring) in their pants.
"I come to you with only Karate - empty hands, I have no weapons; but should I be forced to defend myself, my principles, or my honor; should it be a matter of life or death, of right or wrong, then here are my weapons – Karate, my empty hands"