re: Tip etiquette question: Do you base your tip amount on included taxes?

I rarely tip 20% usually 10-15%

Honestly I have stopped eating out very much as the prices have gotten insane. I can cook a better meal for a fraction of the price and not have to pay a tip equal to another person dining at the table just so they can walk food from the kitchen and maybe bring me a drink or two. I think the locally bad service at our local restaurants has given me a sour outlook at servers.