The article makes me wonder what <i>would</i> make someone want to be around a social group "all the time, or even on a frequent basis".<p>When I was a child of course I wanted to hang around with my friends as much as possible: there were activities which necessitated being in the same place and they were so fun that there never seemed enough time for them. e.g. trading Star Wars cards and playing videogames (no XboxLive in those days, we had to use a 'multi-tap' and splitscreen!). We were all about the "all the time" and "frequent basis".<p>In adult life the equivalent seems to be those people who are always getting me out to play soccer or jam with them. Still activities that necessitate being in the same place and, for some, still activities that they love so much that there's virtually no such thing as spending 'too much time' on them.<p>But I don't think that's it. I think that when you meet up with the same people a lot, doing things the group broadly enjoys, whether you really like ALL of them as individuals or not, you build a camaraderie and that's what makes you come back and hang out "all the time" and "on a frequent basis".