[tomsthumb]

You could try jiu-jitsu. I've yet to meet a person who could honestly say that getting choked out is "boring".

[aethertap]

I was going to write exactly this, but you beat me to it. My whole family (me, spouse, two kids aged 5 and 8) train four days a week and we all love it. I get bored easily with other exercise, but so far have never had that problem with Jiu Jitsu.