Inspired by Cara's things that define you post (someone move that to GC so I can vote for it in thread of the month), tell me the things you have done that at one point would have seemed completely against the grain of who you are.
So, events in your life that 5/10/15 years ago you would have laughed in someone's face if they'd told you that you would one day do that thing. Maybe you now eat bacon with every meal after being a die hard vegetarian, or do some ridiculous amount of sport after previously weighing 300lbs, or joined the army after years as a pacifist, or became a dog owner when you were destined to be a cat lady. I don't know. Things that don't tally up with an old life. Things that if someone from school heard about, they'd say "Really? THEM?". Go!
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For me:
Gave up my career violining
4 years at music college. Probably about 4 years prior to that aiming to get into music college. Everything had been building up to a career as a violinist, and then I achieved that, and then I hated that. I don't think anybody who knew me had any inclination there was another path in life for me, I was a violinist. It was surprising to learn that I had priorities that mattered more than something I'd devoted my life to, but there we go. When I look back at the start of my career, and touring (or crying in hotel bathrooms, as I mostly remember it), it feels like somebody else's life. Now I don't do professional violining, and occasionally flirt with the idea of going back to it, but that just isn't who I am now.
Became a runner / ran 5 marathons / signed up for an ultramarathon
I was not a sporty child/teen. I was on the field hockey team because I'm vicious and people were afraid of me, rather than any natural sporting talent. I skived a truly ridiculous number of PE lessons. I think by the time I left school at 16, the furthest I'd ever run was 800m and genuinely believed I "couldn't" run.
Then we moved to London and I spent my weekends wandering around Kensington Gardens, and Little Venice, and eventually I started slowly running. Since then I've run 5 marathons and I can run a good for age time for London. Next spring I'll be running a 50 mile ultramarathon in one day. If you'd told me any of this 10 years ago, I would have laughed and laughed.
Got married so young
It didn't really occur to me that it would happen til the day he asked me and pretty much nobody in the UK gets married at 20. You have to be super Christian or pregnant, and I was neither of those things.