Humiliation is such a large topic...and as with any large topic, there are degrees. I do enjoy some aspects of humiliation (and to TheSeeker: embarrassment can be part of that...). Some of the enjoyment I receive is a bit worrisome to me...like, why do I get off hearing/doing things that others find offensive (and I mean other subs...)?
On one side of the spectrum, you have fairly mild verbal humiliation...name calling and such: Filthy slut, cum hole...etc. To some, this may be pushing the envelope further than they want it pushed. Meanwhile, I'm screaming...give me more!

On the other side of the spectrum are things I probably can't even imagine (okay, maybe I can...but I'm trying to stay on-topic)

and it's further than I'd like to go with humiliation...
I guess the trick is to find where, on the spectrum, YOU like to be...discuss it with your partner (hope that he/she is willing--that's sort of important as I've come to find out) and have fun without being overly concerned about it. Dwelling and worrying too awfully much can sometimes kill the pleasure/excitment.