dA Chatrooms: okay, i was 12. this has been and probably will remain my most cringe-worthy period in my 9 year tenure. it was terrible, but i had fun since i was 12 and didn't really care about quality.
IM: i did a bunch of 1x1s of subpar quality, but i remember these fondly since i had a looooot of fun doing them. i made a lot of friends this way too, so it was overall a nice experience.
Gaia: i did a brief stint of rp in gaia. this was where/when my writing developed into a prototype of the style i use now. didn't really do much of it though, which is kind of a shame since i love how the b/c rps are organized. but other than that, i'm mostly just *eyebrow raise* at things there nowadays. i do love myself pretty graphics, but damn. this isn't a problem exclusive to gaia, but mfw i see people inflating their posts with unnecessary fluff. it seems to be more common there than other place's i've perused.
iAV: a private rp forum i spent a LOT of time on. this was my rp home from 2011 until it finally closed just last year. the quality was decent, people were friendly, things were pretty nice. barring the cliques and drama that come with having such a long-standing, tight-knit community. but i kinda grew up here and miss it for the people, neat rpg system, other stuff.
Tumblr: i rped here from 2013-2014. mostly homestuck characters, because this was about the time i was really deeeeeply into homestuck. i experimented a lot with my style here, since the characters themselves have such unique voices and i wanted to match my prose to their personalities. plus, i also read house of leaves my mark z. danielewski, so that REALLY made me want to experiment.
Google Docs: since i developed a taste for forum-styled rps, IMs usually just don't cut it anymore. so i went back to doing 1x1s, just over google docs. i also did have a forum for myself to use, but most of my rps since getting off of tumblr have been on google docs.
aaand here we are. so far, iwaku's pretty nice. i prefer it over rpnation, which i was on prior. haven't really done much yet to get the full experience, but i do love the features and interface.