Ya it took me a while too, I did the same thing on my first account 5 years ago
I didn't really see any value to it it until I started searching out people to talk to. Back then I was really big into vbulletin, so I'd answer or help out with any vbulletin question I saw on Twitter. Now a days though it's a lot tougher because now spammers blast crap all over the place and will have vbulletin, php, ipb etc tags on it, mostly for freelance sites.
I also have a good list of local users in my city that at any given point I can look and see what's going on in town.
It's pretty handy but TBH I'm getting a bit tired of it..lol