I hate the jars on the counters of local sandwich and pizza shops that say "TIPS" on them. This is begging for a tip in my opinion.
I don't begrudge them -- I think most people under tip as a rule. And without the jar few would think to tip at all.
Table service for me means 20% minimum. The wait staff (in most states at least) is taxed on a "presumed" percentage of 15%. They don't make squat in hourly, and there are far too many people out there
who seem to take offense at every little thing, as an excuse to leave a marginal tip.
I always get great service when I dine out. (I think getting great service has much to do with the customer's attitude as the staff's.) So, I usually tip around 25%.
Drinks - At least $1 per draft beer. More for more elaborate preparations. At a busy, upscale place, I'll tip five dollars for a drink if it takes 10 minutes to make. The bartender could have poured 20 beers in that amount of time.
Counter service - If it involves making a panini, or something else that requires skill, care, etc., I'll drop a few bucks in the jar (per order). If I'm going to tip the counter person, I do so BEFORE he or she starts my order. Often I'll get an extra slice of proscuitto that way.
If the counter service is more on the order of "scooping some gelato," I'll tip a buck if the person has a genuine smile.
Anything else depends on the situation. Was the cabbie nice? Did he give me helpful advice that only a local cabbie could give? In that case I round up to the nearest bill (unless the fare is 19.96 -- I'm not leaving a cabbie a four-cent tip.)
How I tip is just as important to me as
how much I tip. I've seen some people throw money in the jar as if they were being robbed at gunpoint. How is that any better than not tipping at all?
The only person I
won't tip is the guy in the men's room who wants to help with my personal grooming. I hate that. It creeps me out.