Having tried them all, I think you are able to make an informed opinion of what suits you. I've had solo trips, group trips with family (6 of us) and couple trips with my partner and both my daughters. singly and together. My favourite trip was with my youngest daughter driving around Europe for 5 weeks. I apid for the accommodation ( it was the same price as me going solo) and she paid for the hire car. (she worked for Avis and got the staff rate!)