Oh. Haha. I have a bad habit of jumping in to save my teammates, even...as a healer. but then again, in TERA, heals draw the same about of aggro as crits do, so I do in fact get aggro a lot.
See, in TERA, my usual party doesn't really have ranged, since that's how our guild managed to work out. We have one main healer (me), one secondary, two DPS, and one tank who's often MIA. The secondary healer's just usually kind of cold and logical and does his job from one side.
...On the other hand, you have me, up in the middle of the chaos, maybe just slightly behind the boss, throwing healing circles everywhere because DPS don't understand that having healers on their team isn't a free pass to not bother dodging.
I guess it was both the lack of survivability of Assassins in Aion, and the fact that my high school had an emphasis on volunteering, so I grew to really love helping people out.