It will be good if you at start not only choose first trait but also choose your past (only once, ofcourse=)). This will affect you directly and your traits too. Examples:
1) Son of the demon - your father was a demon, and you fell the bloodlust, so each time you're in berserk you'll do (Trait|Berserkrer*2+2) more damage from any weapon. Comentary|(may be not 2, but 1. because of h-t-h will have a great damage, or may be not berserker but brute, to make it more valuable, for not h-t-h like this - Trait|Brute+1)
2) Green beret - before you come here, you have been trained to survive in a legendary Green Beret Camp, were you've learned that you can use ALL that you see to feed you up. Yep I say ALL. So you can eat corpses THAT LAST Comentary|(red %) and restore by doing this (Trait|Ironman+1) HP. Comentary|(not so much to destroy the game ballance, but sometime it'll help you to survive=) also it'll set an ironman trait more valuable)
3) Telepath - your head is a great sensor, so when you're near to a wall you can see (Trait|EagleEye+1+1 commentary|(wall)) squares from your position even if there is wall. Commentary|(If you like barrels, this is for you)
4) Western boy - you've lived in the Texas, saw many western films, and trained yourself. In result you recharge any weapon twice faster (MovesNeeded|Reload DIV 2) Comentary|(Trait|Reloader affects MovesNeeded|Reload)
5) Jog - you're from india, were you trained to not feel the pain. So you'll deal (Trait|Hellruner+1) less damage from lava and acid
6) Gladiator - you know how to use armor, so it can take (Trait|ToughAsNails*20%+20%) more damage
7) Sniper - you trained as sniper, but you get HERE... Old practice helps you, and you can deal with (Trait|SonOfABitch*10%+10%) chance maximum damage. Comentary|(according to EACH bullet)
Your comentaries...