I was thinking about the original poster talking about taking up biking after retirement. To be honest, I think it can be done if this has always been a life long dream. Also, to be honest, motorcyling requires quick reaction, being attentive and always being on your toes. Frankly, I'm not as sharp and I'm not as coordinated as I was a few years back, that plays a large part in my decision to get out of biking.
As for the Miata, I've got a turboed job with a bunch of Flyin Miata parts on it, running 200 whp right now. Getting ready to change out the factory computer, I like to tinker and this thing is really quick right now.
As for boating, I'm in Kentucky right now but next year I head back to Tulsa, Ok and will be boating on Soldier Creek at Lake Texhoma, hopefully in a 26' Sea Ray.
Once you get the biking bug it never goes away. As for the Harley thing, I had a Honda, Yamaha, Kawasaki and HD. (HD stands for hundred dollars, you can't buy anything in a Harley shop for less that a hundred bucks). I appreciated each bike on it's on merit. I met a lot of wonderful folks in the Harley crowd.
A previous poster noted he rode for 35 years without an accident then had one that was very serious. This reinforces my decision. Quit while I'm ahead.