(Hmm… I guess that answer varries depending on who you ask. Honestly, the best answer I can think of is that, unlike RPing on skype or Facebook, tumblr is a lot more customizable and interactive. Text and format can be changed and photos for icons and such can be added easier. Plus you can write as much as you want since the posts don’t have a character limit like on AIM. It can be a good or bad thing depending on who you ask. Sometimes people go overboard with customization or formatting and I can hardly figure out their blog or read a thing. I try to keep my blog as user friendly as possible. The best part about this siteis finding new RP partners is waaaay easier on Tumblr. So I guess the combo of creativity and community is really appealing, hence why there’s tons of RP blogs on this broken hellhole. Really, all you do is post answers to ask you get, reply to any rps, or just put up whatever else you feel you want to share in between. It could be headcanons, life shit, you name it. It’s loads of fun.)
(I don’t know if that answered your question. If I gotta elaborate on anything please let me know. And I hope it’s not weird of me to follow you even if you’re not an RP blog. I’m really entertained by your posts and couldn’t help myself)