I've never been an admin (well, I had the badge for about two seconds once), but I used to be a moderator. I didn't really do much as a moderator since I modded low activity forums and I mostly had my powers to run The Smog. I really enjoyed being the de facto head editor of The Smog, though sometimes it was very stressful staying up to get the magazine ready by deadline, with people not meeting the submission deadlines and so on, which I guess is only relevant because it was related to my main moderation duties. If anything, modding PO is more stressful, so I try to make it a fun thing by coming on, getting involved in the chat, talking to my friends, and so on -- I try to avoid kicking or muting, since I find one warning is usually enough for people who are minorly breaking the rules. So it's not THAT stressful if I don't do it all day every day. :)