I've always been told i'm too generous with my tips, but it makes me feel good that a good waiter and server can throw some gas in their tank or buy some beer after work. I have friends in the restaurant business and i hear them complain all the time about busting their asses off for a party of people and getting stiffed. Funny thing is these are the ones that tell me i tip to much money. If a 20 0r 40 spot puts me out, i shouldn't be out at a resturant in the first place.