Good Natured

Good Natured is a Fallout, Fallout 2, Fallout Tactics, Fallout: New Vegas, and Lionheart trait.

You studied less-combative skills as you were growing up. Your combat skills start at a lower level, but other skills are substantially improved.

Fallout 1, Fallout 2, Fallout Tactics
First aid, doctor, speech, and barter get a +15% bonus. You get a -10% modifier to starting combat skills (small guns, big guns, energy weapons, unarmed, melee weapons, and throwing). This is a one-time bonus only.

This trait is useful, as it is unlikely for even a combat-oriented character to use more than 3 of these skills, and in all likelihood only 2. As such, 20% is "lost" while at least 45% (speech, barter, and doctor) is gained. In Fallout 2, first aid is mostly useless as one can wait indefinitely. This is not the case in fallout 1, and so in fallout 1 all 60% of this is useful. One may also tag their most used combat skills, negating the initial loss and increasing by 5%.

Fallout: New Vegas
This trait in New Vegas will boost your social skills, while lowering your weapons skills. Although this trait seems it would be preferred for a pacifist style play, it is not a bad choice for aggressive players either because they will usually use one or two types of weapons, allowing this perk to enable them to use all of the boosted skills eventually.

Lionheart
Your combat skills start at a lower level, but barter and healing rates are substantially improved. Barter gets a 25 point bonus. You also get a negative 5 point modifier to starting melee combat skills (one-handed, two-handed, and unarmed). This trait cannot be selected with Nasty Disposition.

J.E. Sawyer's Fallout RPG

 * You're a friendly person and are hesitant to employ violence to solve problems. You have +2 to medic, persuasion, and science. However, your combat sequence is -4.