well, good natured is the only trait that actually acts more like a perk, because with your 200% and up with your chosed weapons class you're not gonna want to pick up and use any other weapons than your selected special weapon class, and this is what the trait does:
Weapons skills: -10%
Total losses: 60% worth of skill points distributed in your weapons expertise, 6 weapon types, fair, ain't it not?
FA, DOC, Barter, Speech: +15%
Total gains: 45% worth of skillpoints in your trading and healing skills
Conclusion: the only drawbacks are that you lose 15 skillpoints on speech since it isn't implemented yet, and you get a -10% nerf on your chosen weapons skill.
However for a trait, the bonus FA and DOC really help out a lot.