Yeah, I’m like a lot of you.
Some of them are useful, some not. Let’s go back to my second year in grad school.
Yes, basically Prob & Stats became my obsession. About this time, I also started running. All I did was run and study. Between November and January that year, I ran a marathon (pretty fast, 3:23) and was one of only two people in my class to pass all 3 qualifying exams.
Basically, after exams that year I stopped studying and running. I started playing poker. Played every week, played free online, read (and bought) tons of books about poker. Developed my own theories and strategies, took notes, got good. Played in casinos, played online for real money, a lot. I was obsessed for a few years.
That kind of cooled off when I got into sports betting. . .again, online research, online action, creating my own theories, taking notes, meticulous records, etc. etc.
After one particular football betting season, I needed something to do so I got into chess. I bought software, I bought books, I bought a nice set, I bought a CHESS SHOP! I played in tournaments, played online, studied the game.
Anyway, the latest obsession is cycling. I picked it up last summer because my knee wasn’t really allowing me to run. Can’t just ride a bike though. . .joined a club, bought a couple books about training, learned about racing, joined a racing team and this year will be my first year of racing. In some ways, I feel like bike riding will stick with me. I have always been in decent shape, and it’s so much better than running.
I’m also still somewhat involved in chess.
Other things I’ve farted around with to a lesser extent:
Bonsai
Flute playing (actually over several years until it was established that without a doubt, I have no musical talent)
Furniture upholstery (very briefly. . .didn’t even complete a project, but I was into it)
Sculpting
Rock climbing
Lately I’ve sort of been reading a lot about finance.