Age 7 to 8 : TV Ariels
Age 4 to 18 : Lego
Age 8 onwards : Electricity
Age 9 to ten onwards : Electronics
about fifteen onwards : Railways - modeling tghem including obscure details such as pantographs and overhead catenary which actually looked like the real thing
13 onwards : Cycling, fairly genrlte getting longer rides as the years went pn
20 onwards : Cycling hard core - 60 10 100 miles in the day, hostel weekends, week and fornight long tours, camping, building my on wheels, mellowed somewhat in my late forties and early fifties
On joining the Quakers ages around 24, delving into all the procedures etc
On finding an interest in Buddhism around 35, rather similar, and to the point of being a volunteer builder of a number of Dharma centres as regards the electrical side of the jobs.
Age 50 onwards : The autism spectrum, after finding a few too many moments of recognition listenning to some public lectures recorded by Temple Grandin, Tony Attwood and others.
Age 29 to 32 or so : Basic psycology after a successful course of sessions with a counselling provider sorting out some of the difficulties with clsoe relationships.
Age 37 onwards : Consensual, safe and sane kink (but there had been some pretty strong elements of that in my make up since age 7 and others going back to age around 3 or 4.
Sports : Zero interest throughout lifetime.