I would recommend, Snowboarding, great rush and so much fun.
Wake boarding, again a lot of fun and physically challenging
Both of those are quite seasonal
I have got into RC in a big way.
I have a TRX4 crawler for the scale driving and requires plenty of tinkering
I have a Baja Rey for blasting about and boosting jumps in a scale way – love trophy trucks and pre-runners.
I have a RWD drift chassis I use on carpet indoors at tracks, so much tinkering and lots of fun.
Defo satisfies the tinkering itch without laying on the floor under a car.