At the car show in Auburn a month ago there were also a few choppers. I find these very interesting to photograph.
Back when I was a kid (and very into motorcycles), nearly all choppers were something else entirely. A guy would take a stock motorcycle, put some long forks on it, and you had a chopper. Real, purpose made choppers weren't that common, and the ones that were around looked like they would just fold up on you.
Now it's really amazing, there are bikes like this all over, and they cost a bunch. Like 100 grand. And as you can see, they are like artwork. Incredible, paint, chrome, curves. I could get into photographing these more often. Hmmm, wonder if chopper owners are looking for "chopper portrait" photographers? That would be quite a specialty.