Skilled

Skilled is a trait which appears in Fallout, Fallout 2, Fallout: New Vegas add-on Old World Blues, Fallout Tactics, Van Buren, J.E. Sawyer's Fallout RPG and Lionheart.

Effect
You gain +10% to all skills but gain a perk only every 4 levels instead of 3.

Effect
You gain +5 skill points per level but gain a perk only every 4 levels instead of 3.

Old World Blues
"You're skilled, but not experienced. You gain +5 points to every skill, but you suffer -10% from experience gained from now on."

- Fallout: New Vegas description

Effect
You gain +5 to all skills but you suffer -10% whenever you earn experience points.

Bugs

 * If you use this at the beginning of the game, you will have the normal effects. However, if you re-apply it before going into the wasteland, the positive effect doubles and the negative effect doesn't double, remaining at -10% Experience. The trait can also be later reapplied at the sink for a total of 15 points to all skills, while the penalty remains at -10%.
 * If you take the first rank of Swift Learner perk to offset the penalties of Skilled, you will notice a 1% overall experience loss on rewards of 100 or more (eg: 99 instead of 100, 792 instead of 800, etc).

J.E. Sawyer's Fallout RPG
You gain an additional Tag skill. However, you gain -1 skill points every level because you often spread yourself too thin.