[JakeBlues]

There is need of a downside to those.

I'd suggest something, like Tommi said, that gives a bonus to a skill, let's say +2, no humanity loss, but makes you loose 1 elsewhere.

This way, you get a bonus, but got to pick the right other stat to take down. More precision in the builds. I'd suggest an intelligence drop, or endurance. But it would be equipable, like gear.