I always seem to tip heavy no matter what. I guess I contribute to ruining it for everyone.
I'm going to start a new regime for myself. 5% if you are absolutely abysmal, 10% for crappy-ish, 15% for normal, and 20% if you are sexy. I mean good.
Does anyone else find themselves tipping extra for hotter waitresses? I know it's totally shallow and ridiculous, and I'm not even single, but something about some cutie serving me is just so awesome.