I only give five stars, with the exception of two extreme cases, one involving pee. I’m sorry, but pee pee girl doesn’t deserve five stars.
I gave everyone five until somebody reminded me that low passenger ratings keep other drivers from having to put up with horrible riders.
I always rate 5 unless they are way stupid. I don’t worry about tips or my ratings. Just do my best to give my best. It all works out in the end.