I got a question last night about why I choose Mechanic for the main character. What happened, ironically, was that in testing each of the candidates, I eliminated...all of them.
I like Scholar, but Scholar needs to play through the story from the beginning, and Soldier was just a no.
Medic I eliminated for more personality reasons. What I do on the Aetherlight is not really heal people - I actually am pretty terrible at that and do the exact opposite - instead, what I do is go around and fix things (or try to). So Mechanic it is.
As for Mechanic itself, I've found that it's actually a pretty terrible class - the special ability doesn't really seem to do anything, even worse than the Soldier abilities. Apparently it stops your clothing from being ripped to shreds? Which continues my tradition, as usual, of making comically terrible decisions. And since I never really wanted a profession anyway, my profession is pretty much a decoration that doesn't do anything and we can all get back to normal.
Yay! 
Now, to go find Lukas' cat.