Former pizza delivery guy here too. I will never forget the time that I was delivering to a bunch of older adults who are partying in a motel, and the guy at the door was paying for his $15 order and handed me a 20, with which I was plenty happy. At the time, that was an awesome tip. There is a guy in the back of the room yelling “hook that dude up!“ And the guy who is paying me asks me “is that enough, man?“ And I just said to the guy “hey man, I am grateful for whatever you give me. A tip is always a bonus…”. The guy in the back is still yelling. “hook that dude up!“So the guy at the door says “ I just don’t wanna rip you off man…” And then hands me another 20, and says “is that enough?” And I just repeated what I said to him before. That $25 tip on a $15 order was something that I will probably never forget as long as I live.