This may sound funny, but to me a tip is a tip not a monetary award. That said, I'm a little funny about it and silly to the waitress or waiter I'm sure. I give them a 'tip,' which may be advice, compliment, stock tips, or whatever. Again I say silly of me, but if the server doesn't offer genuine care or service I don't 'tip' them. However, from a respect of the industry, economic times, knowledge of those who make a small living from tipping I always leave a financial tip usually 15-20%. But, if I didn't value their service I don't 'tip' them. dumb, eh? A personal thing, huh?