I'm a pizza delivery guy. Sure, the customers who tip well stand out, but honestly, being genuine and friendly are key. I'd rather deliver to some of my elderly or low income customers who are nicer to me and don't tip or add like $2 than some of my more arrogant customers that tip $10-15.

Not saying I'm not thrilled with the larger tips, and that's what pays the bills, but attitude and courtesy will have me do subtle things like bring the beverage I'm pretty sure you forgot to order, or making sure the little things are done the way you like.

Also, I can get on board with the $20.23 tipping trend from both sides (I treat my fellow service industry comrades well when I order)