Is my use of vBcode starting to catch on to you, Wraith?
Yes, mr. Quizmaster, on question 1, my answer is: Noone is sure, since the devs are playing a lot with this feature right now. At the current moment, you can attempt to repair it to 100%, but a failed repair (or a successful one, if you are unlucky) will remove a bit of the maximum hitpoints. Nothing is supposed to last forever.
Oh, question 2? Hmmm... I'll go for... setsuko somethingsomething. If it is still available when I get it. After all, it is conventient for people to know who I am when they meet me ingame (I've hanged around here for a while, and several person recognize me. Might as well use it to my advantage, ey?
And.... for number 3: I'll be something combat oriented. A bit of close combat, a bit of rifles/carbines, and then some commando, for the grenades and heavy support weapons. Then I'll mix some social skills into the mix, musician, creature handler, artisan, entertainer or medic, depending what I'll find the most fun.