When I was at secondary school, PE lessons were mainly football, rugby, cricket and gymnastics. Very focussed on the best - we had some tennis lessons which were the 8 best sportsmen in the year playing doubles on the two courts, with the rest of us being able to learn by observing only.
None of these really interest me. I am liking squash - despite not being good at it. Swimming was something we did in the first year, with the wonderful logic that you can huniliate a non-swimmer into suddenly becoming a good swimmer. But free from the school lessons, it is something I do from time to time.
So I saw the karate and thought "why not?". Completely out of leftfield for me. Not something I have any experience of. Doubt I'll ever get a yellow belt. Either I'll enjoy it and continue or I'll decide it's not for me.