I'm always running at least one group RP as a GM, as I enjoy writing at my own pace and storycrafting for the regulars. However, I sometimes run another one if I feel inspired to try an idea. As for participating, I've found myself to be quite picky about what I want to write for (until recently with an unstable IRL situation not helping), and thus could take years to find an RP I want to join. However, as a result I tend to hyperfixate on the rare RPs I do join. Very rarely have I participated in multiple ones, and I've found it to be difficult to sustain.