If you play games that require a DM, is that you?
Not usually, though I've dabbled off and on for... well, since early high school. It was easy back then with full-on Dunning-Kruger confidence at my back, but in hindsight my style/methods would have never flown with anyone other than my closest friends, who I think humored me just to see what I'd do. We had fun, but it was very rules-light (at the time.) After that I didn't run a game again myself until... some time after the first Pathfinder system came out, whenever that was. (I just tried to Google it but got swamped in Nissan ads.) Anyway, in my group there were four DM's/GM's, so nobody was ever "the" DM for long. Then one moved away and it was three DM's, then a new one joined and it was four again, then I threw my hat into the ring and it was five, then someone died and it was back down to four. This was more than you needed to know, but whatever. =D
I ran a few one-off games when I thought I'd come up with a good idea, but I didn't want to ever be in charge of an entire campaign.
We like to break our campaigns up into chunks. I've technically only done "one" campaign, but it's been divided into three six-month portions, with other people's games in between. Played it in 2015, 2017, and 2019; first two were in Pathfinder, the third was in Savage Worlds, because we changed continents and tone. I suppose you could argue they were three mini-campaigns, but they were all in the same world with the same underlying premise and locations and NPC's (all homebrew.) If you hadn't played the first two, the third probably wouldn't have made as much sense.
One-shots are fun, though, too. It lets us try a lot of different systems, like Delta Green, All Flesh Must Be Eaten, CoC, etc. We're not married to DnD, as it were (or Pathfinder). I hadn't even played that system until the D20 version came out. (Not counting computer games, which were their own separate thing. But I'm still not 100% clear on how THAC0 worked.)