What are your criteria for leaving a tip at a restaurant?
I'm curious about how people tip, here and elsewhere. So tell me what country you're in, because I know some places have different tipping procedures than others.
I'm in the US, and I usually start a baseline 15%. To me, good service is someone filling up my drink to such a degree that I don't find myself thirsty. Most of the rest of the experience besides basic niceness is outside of the waiter's control.
If they fill up my drink when I need it, I usually go up 5 or 10%, depending on how nice they were overall. But if they were rude and brunt or pushy, that's when I start going below 15%.
What are your tipping criteria?