I am on one of the lower rungs of the seniority ladder in my department. It makes perfect sense--I'm not on the tenure track, after all. One negative consequence of this situation is that I have little to no control over the direction of the department and how it operates. (Not that my colleagues are dicks about it, or that there's anything I'm especially upset about; it's just that there are lots of decisions I'm not involved in.) The upside is that I don't have to go to any faculty meetings. But although I've complained about meetings before, the fact is that they're a necessary evil. If you want to influence the department you work in, you have to go to meetings.
I'm starting my second year here this year, and I guess they like me okay, because the honchos are letting me make some decisions about our speaker program. (I realize that this is probably just because they don't want to bother. Whatever.) In any case, I've been surprised at how gratifying it's been. Just being in on a couple of relatively minor decisions has made me much more like a member of the department, and less like some guy who just teaches a bunch of intro classes.
Although the extra workload has been pretty light, and although this is probably one of the more fun aspects of running a philosophy department, and although department politics and heavy-duty stuff is pretty much absent from this job, I can't help but suspect that the eventual glut of time-wasting bullshit will maybe possibly be worth it. Depending on the details, of course.