Me too, I've thinned down my collection over recent years but still have a couple of decent timepieces including a Rolex GMT master, a Cartier Tank Francaise and an old mid 1980's Tag F1.
Don't give up Motorbikes because you're over 50, I'm now into my 50th year and most of my biking mates are all older. keeps you young!
Cars. Working on them, reading about them, buying parts for them, driving them.
Photography is my other hobby.
I have not been shooting any photos lately but need to get back to doing it as it's really fun. Got into film photography a few years ago and really love it for black and white.