Yeah, I kind of know what you mean - The RPs at Discord would be like the IRC RPs that this site had before the IRC broke. I would like to try thread RPing here but I just can't spare the time required to maintain a good RP. I'm not here for hours on end daily/nightly due to the demands on my time IRL. I'm usually here for half an hour to an hour on the weekdays unless I'm updating one or more of my old threads, posting one or more new thread(s) or helping a friend out via PM (I'm rarely here on the weekends since I have to do chores like buying groceries, doing the laundry, cleaning/maintaining my home, etc). The "Three Words" games are the closest that I have to approaching a quasi Role Play - Perhaps even better since multiple peeps can join in on the fun in the story games at any time rather than it being a one on one affair between two people plus there is an audience tuned into the ongoing story rather than it being a "private" affair (Nothing is truly private here though as anyone can see the "private" RP threads in the "Role Playing Realm" section). IMHO, the "Three Words" games are more challenging in that each player has to try to figure out what the other player(s) is/are thinking in terms of a plot for the ongoing story while trying to work their own ideas and the other player(s) ideas together, three words at a time, in order to create a meaningful story that can be enjoyed by all (Players and viewers alike). It's sort of like the story of "Stone Soup" ->
https://en.wikipedia.org/wiki/Stone_Soup.
Why not try joining any of the "Three Words" games? Read the story written thus far in one of the "Three Words" games and then contribute three words of your own in a new post to continue the story game! There are "Three Words" games covering the universes of "RWBY" (Four different ones, each started by different members), "Naruto" (Four different ones, each started by different members), "My Little Pony", "Paw Patrol", "Kill La Kill", "One Punch Man" and "Bleach". There is also the "3 Word game" that involves a transgender theme, an "Anything Goes" game where like the title suggests "Anything goes" (To a certain extent) and the original "Three Words" game (The last two actually have more complex, long developed story plots, so if you're starting out, it would be easier to join in any one of the other games that I mentioned. If you decide to join in any of the last two that I mentioned, be prepared to first do a lot of reading in order to "Catch up" with the story so that you can contribute to either game's storyline effectively). You can join in and leave at any time and your username will appear in the General Chat section as you play!
If you're feeling really adventurous, you could start a "Three Words" game of your own. This is just a suggestion - Perhaps you could create one involving the Touhou Project universe with Tewi Inaba, Reisen Inaba and other characters (Maybe the Scarlet sisters, Remilia and Flandre?) in the land of Gensokyo and of course, there should be diapering involved (Maybe have the two sets of sisters encounter each another and let's see who diapers who?)~!
BTW - I found a cute, fan made
MMD animation with Tewi and Reisen fighting over some
Dango ->
https://www.youtube.com/watch?v=2Wxm6axzcHk. Enjoy~!