Just want to comment on shuttle drivers for car rental vans and hotels. My husband is elderly and slightly handicapped and we are exceedingly grateful when a driver doesn't make my husband feel like less than able by waiting till we ask for assistance. We are very appreciative of the driver grabbing our bags and putting them on and off the van. We tip him well for the kindness and we feel he deserves it. I don't think any person in the service industry can please all the people all the time, so one just has to use one's own judgement as to when a tip is merited and when it is not.