I prefer to travel alone, sincerely I couldn't stand family trips since I was child: my parents every summer went to sea, while I prefer mountain or, better, capitals and cultural cities abroad, and they spent whole days shopping, while I hate shopping. Moreover my younger brothers made my family holiday a hell so I prefer by far to travel with my friends.
I love travel with people with which I have common interests and, to be honest, it hasn't been very simple, so I had to accept often trip programmes with my friends that I didn't like a lot, but... everything rather than with my family!