I'll be the odd ball here:
My main bike hobby for the past 8 years or so is bike polo. It's just how it sounds, riding a bike, chasing a ball, putting it in the net. I've played all over the country, and a few times abroad (Canada, Puerto Rico (not really abroad obviously, but seriously, such a different wonderful place)).
Here's a video of one of my games from 2 years ago at the north american championships.
https://vimeo.com/150072082 We ended up dropping that match, but gives a view of the sport. I'm white helmet-blue shirt in that video.
I also commute on a flat-barred cross bike. No cross racing from me to-date. Maybe i'll pursue it eventually as my polo days are winding down as of late. Also road mountain bikes for a little while for fun. Had a 29er hammer by rocky mountain bikes. Put a rockshox fork on it, then just fell out of interest with it and sold it.