I once figured I'd try out this weird thing called 'roleplaying' when a couple of online buddies started one and invited me along. That first RP was pretty terrible and looking back on it now, I committed so many RP sins that I feel ashamed for my younger self. But I had loads of fun with that RP at the time and I very much wanted to venture to other adventures after that first one faded away and died.
I think what I've always liked most about stories in general are the characters. I really like picking out behavioral/verbal/whatever habits they have, what sets them apart, their motives, what shaped those motives in the past, and the like. I like asking questions and having those "oh!" moments when some reveal makes everything click. Naturally, I also like creating characters of my own and getting into their heads once in a while. It's quite nerve-wrecking to try to come up with believable characters with answers to the loads of questions I like to ask while trying to keep them all different. But I do like the challenge as well and succeeding at it is quite the amazing feeling.
So, I suppose the answer is: Because it's fun and I like character creation.
I always wondered why people of different languages choose to rp in English specifically. Especially if the reason isn't to better their English. Aren't their other-language rp communities? Or are English users pretty unique in this hobby?
When I started RPing, I didn't even consider searching RPs in my first language, I suppose I just instinctively knew there'd be no point in trying to RP in Finnish because who the hell even talks Finnish? And RPs in Finnish on top of that? There's just way more to choose from in the buffet of English RP and I want to devour all the things.
Also, at this point, English just feels way more 'natural' to me when it comes to writing. Finnish is just... derp. And I can write potato in Finnish. Which is why I should write more in Finnish.
Instant edit: Aaaand I've almost always done most of my internet shenanigans on English sites/forums anyway so I suppose it was only logical for that pattern to extend to RPing as well.
My poor neglected first language... :,I