I'm pretty much identical to OP by the sounds of it. I'm principally a Cisco voice person, but I also do Wireless, Switching, Routing, Firewalls, AD, VMware, Security, and christ knows what else. I often find myself flicking between these different areas ALL the time.
Recent events have made me question what happens to me if I do go looking for a job, because I have zero qualifications in any area, and because I'm constantly flip-flopping between things, I've found studying hard - I've tried to study for CCNA, and to be honest I could probably almost pass it anyway, but reading and trying to process the course materials is hard when I might've spent all day bashing away at LDAP stuff, then come home and try and study something completely different. For some reason that just doesn't work for me.
So yeah, I'm kinda worried about this, as if I go apply for jobs, I've little to show for my knowledge, except for the fact I've spent about six or seven years doing it in anger. But then throw me into a problem and I'll probably dig my way through it and find a solution.
Project management really doesn't appeal to me either, as being at the sharp end is where I enjoy things most, so whilst I will do project management, it's a means to an end, and I can't help but feel it'd suck all the fun out of working in IT for me.