I actually tend to leave 20-25% at a buffet. If only for the main fact that the one I regularly go to, I see our waitress get stiffed by at least one table everytime we go. And she's always there and always attentive. Stands to reason, that that is just an example of what happens in buffets everywhere so I tip that way at every buffet.
So I like to leave a little extra to make up for the jerks that think they can leave nothing(or cr*p) cause they picked out their own food and think that's all the waitress does. And no i'm not rich or well to do, but I believe that if you have enough money to go out to eat, then you should also theoretically, have enough money to leave a decent tip...if it is warranted of course!
And like a poster said ealier, she does more work than a regular waitress does. She has to get the order, get the drinks, take away your dozens of dirty plates, refill your drinks, refill the buffet with hot food, come get more dirty plates, you get the idea....lol
I'm very passionate about this subject....I should just avoid any post in the restaurant boards

lol
And apparently i'm a thread hijacker, too

There was a thread about strollers and somehow(I can't remember how!) the thread is now a bunch of crazy people calling each other ig'nant about views on tipping...
*Sigh*