I voted "Yes, sometimes." because I have, in the past, frequently been a DM, but have not been a DM in almost 2 years. I had some burnout issues, and my current group has problems meeting regularly, so its taking some time for the party to get through RttToEE.
However, I've been designing a new campaign for the past year or so, and I think its a pretty good one. If/when the guys in my current group are ready for it, I'll unleash it...
As for "Run Club," I was in a group in Austin back in the 1990's that did something similar, and it really improved both my DMing and my role-playing.
We had a big group, but we also had some problems getting everyone together- sometimes even the DMs had to cancel last minute. Truly frustrating!
So I suggested that
everyone in the group be responsible for running a game, and each week, we had a primary and secondary DM. Players brought characters for that week's 2 active campaigns, and played the primary one unless the primary was unavoidably absent, in which case, the secondary was played. Some people only ran a one-shot or short-lived campaigns. Others ran campaigns that spanned more than a year. We played a lot of D&D and GURPS campaigns/one-shots (several guys were SJG playtesters, so we became so as well), and HERO and RIFTS were probably the next most popular. One guy always ran Mecha/Anime-themed campaigns, in a variety of systems (MechWarrior, Mekton, etc.), another got us involved in a playtest of an unpublished RPG called A.C.E.
That really got you thinking about RPGs from both sides, and in depth. I know that my PCs, which had mostly been fun to play but lacking any real depth, suddenly developed histories, quirks, and other characteristics. In short, my PCs are much more rounded individuals.
And an analogous change has happened in my campaign development.