I'm not technically FIRE'd--only "taking a break," but I'm close to my FIRE number and so am not sure whether I'll go back. Here is what I miss so far:
-my team, especially one-on-one meetings with my team members. we all had really good relationships and i enjoyed learning about them, coaching, and helping them solve problems.
-relationships with my co-workers and manager
-solving complicated problems for people, marshaling people/resources/things to get the job done
-being around people who know and respect me, who trust me, who ask for my input on important things.
-having a schedule
-the paycheck (of course)
Having to build all of this outside of the work context just feels like starting over, you know? I don't miss the being at work all day part of it, but the types of relationships and being trusted to do important things is something I want to find again.
I know that kind of the point of this site is that people dislike their jobs, and I did too, but I also got SO much out of it. It forced me to grow in ways that I wasn't confident enough to seek out on my own at the time. I don't think I could have stayed any longer, as I was more than ready to take a break and try something new, but I still miss all of these things quite a bit.