How much do you usually tip?

I never go by the "15% rule", I just tip based on how good the service was..it could be more or less than 15%.

I usually tip at least 20%. The math is easy to figure, and in tipping well I feel like I am doing a little something to counter the stereotype of women being poor tippers. I never tip less than 15%, because I remember that this is how the servers make their money. If the service was unremarkable, however, I will make a special effort (with calculator if necessary) to make sure I don't leave even a penny over 15%.

I am a generous tipper. The only thing that alters my tips is poor service. I give 2 to 3 dollars tip each time.+

I start at 20%. You can go down with very bad service, and up with exemplary service.

In my state, servers make $2.13 an hour (I served for 10 years) and rarely get raises. So unless someone is downright rude to me, they get at least 2 bucks no matter how slow they are. If I get exemplary service, depending on how many guests are at my table (usually only 3 but sometimes we make an extended-family thing of it) it's $5 and up. If I am short on cash that day, I'll go through a drive up.