Just because youre more interested in geocaching and building robots doesn't mean everyone else is. I get that these are just examples, but it's ok for kids to be interested in things their parents aren't.
Of course. As I said, limits. Some counter strike is OK, too much is not and it should not be in place of physical and educational activities. The kid certainly should be able to choose their own activities, but these should be educational and physical at least some part of the day. I specifically chose examples of potentially fun things to do because I wanted to show that it doesn't have to be boring study time/ride a bike around the block time.