My blogging activity is still not up to normal pace. Feel free to attribute that to either (1) my computer being down, (2) the usual indoor inactivity (and outdoor activity) of summer time, (3) summer university–or any combination of the prior of your choosing :-).
Meanwhile, I found a very good post from Jeremy Zawodny on sense of accomplishment, and where you get it from. He divides personalities into the individual contributor, the team player, or the team leader/manager. I think the thoughts are very spot on, so go have a look at what he writes.