I think KingKeoni's going to need to take some vacation time from work to answer this question...

(Come on, that was a funny jab, right there. And true! It's NOT a personal attack.

I got to shake hands with Keoni at the shindig, but unfortunately I had to take off before getting to spend any time with him. When's the next 2aHawaii get-together? How about just a happy hour? Anyone?)
Anyway, this is a very good discussion topic, FunTimes, and I predict it's going to get a lot of interesting responses.
For me, I can't speak to any great, sweeping passion regarding guns, as I am still very new to all the various aspects of it: political, legal, sporting, technological, collecting, history, social/communal, personal safety, and, I hesitate to even say this, but... psychosexual. Guns are, Freudianly speaking, penises.
I'd say I've focused so far, in descending order, technological, sporting, social/communal, collecting, political, legal, personal safety... and I'll let you decide where psychosexual falls on that list.

One thing I didn't mention, that just occurred to me, is identity. This overlaps with a lot of the other areas in the list above, but I think once you start getting into guns, it becomes a part of your identity, to varying degrees. I've never owned a gun, or even talked that much about them, until just about three months ago, and already with a lot of my friends, I've become "the gun nut." (Which is pretty funny when I compare my knowledge, experience, and extent of ownership with some of you fine gentlemen.)
What got me into guns 3 months ago? I think it was the Groupons for Waikiki Gun Club! I was looking for something fun to do, something new, for cheap, and the Groupon came up, and I thought, hey, why not? I really enjoyed it, felt like I was pretty good at it, and wanted to get my own guns to go and shoot my own guns.
I list personal safety last. I've said this before, in person and in this forum, in all honest approximation, I don't think guns are the right tools for my personal safety. Given the environs in which I spend my time, a gun would probably do more harm than good. My apartment is tiny, and faces another apartment building. If I fired a weapon in my home, I'm very likely to at least shoot out someone's window. My neighborhood's not a high crime area, and my apartment building's not very accessible. Of course if someone were to break in with a gun, I'd be in trouble, but I have to weigh the likelihood of that versus the costs of preparing for that and the possible negative consequences of using the wrong tool for that possibility. I'm much better off with something short range and non-penetrating, like a taser, bat, or maybe pepper spray, but given the size and layout of my apartment, I might as well set off a tear gas grenade.

Anyway, I like guns. They're fun to shoot, fun to study, and it's a good way to meet very interesting people with likely similar views on other things.