I just realized this morning why I always go and pick up pizza rather than get it delivered to my door. I hate the tipping process. I hate the expectation. I hate to think what they might think of me based on what I give them.
The only person I tip on a regular basis is whatever lady cuts my hair at Great Clips that day. A $13 haircut and I tip $5. Not because of the quality of their work, but because I'm confident that a 38% percent is good enough to avoid resentment.