I work in the New Brunswick, NJ area. Here is how I rate customers. 5 Stars for a customer that tips. 4 Stars is this the max for customers that do not tip. 3 Stars if I take a client to the airport and help with 3 heavy bags and the customer doesn't tip. 3 Stars for a customer that puts in the wrong pick-up address unless he tips. I've never rated a customer below 3 yet. Would have to be pretty bad. I did see a customer rated 1 star, i didn't accept that ride. Also, I have a sign on back of seat that says "TIPS appreciated". Clients think that the tip is included in the charge. I explain that some car services will automatically add a tip to the fare. UBER does not. What about you? How do you rate customers?