NotAgain has actually been a consistently useful member of my team and I just got my 7th badge :P, looks like he didn't turn out nearly so horrible as you thought he would.
I discuss all the details on my emerald scramble's home post, just check that out.
And I'm ALREADY a mentor, it's not to achieve anything extra on the site (everyone agreed that no badges were to come of this), it's just so I can get some practice teaching people, and also because I like helping people out with stuff. The Mentor lable is really easy to get if you have a badge anyway, you just have to make an application. However you do need a badge to become one.