I have worked for over 20 years (just made myself feel old), in retail aka customer service industry, and service industry for many of the jobs I have held. During that time frame I have learned a few things.
Unless somewhere on the receipt of my transaction with a customer states: Tip _________ ; my customers are not required to give me a tip for my service. Also, I should never make my customer feel obligated to give me said tip. If a customer wants to be extra generous and go out of their way to tip me awesome bonus, I don’t do my job driving someone with the expectations of getting one, neither should anyone else.
This is a customer service job with human interactions involved. Don’t assume anything about your passenger, knowing or not knowing something. Uber lately has had glitches regularly lately. Don’t assume that since you are outside waiting for your ride they know where exactly you are, call or text and wait. If your bitchy/moody at the start of your shift stay home. Stop thinking you are the best and realize we are all human. Not everyone will be happy. Just have fun and enjoy meeting new people out there.