So given the evil-ish nature of our available companions is it advisable, or even possible to have a good PC go through EA? I've tried with poor-ish results so far. Lae'zael even went berserk in camp, shouting "Intruder!" on going on a rampage. Took a good dozen rounds to take her out...
Going good has not been a hindrance so far for me. In general, so long as you make the smart decisions regarding the friend in your head, even the evil-ish characters don't hate you too much.