Masochist (3.5e Trait)
From D&D Wiki
You enjoy the feeling of pain.
Benefit: You gain a +1 morale bonus to attack attack rolls and will saves when your hit points are below 50%
Drawback: You take a -1 penalty tp attack rolls and will saves when your hit points are above 50%.
Roleplaying Ideas: You love pain, absolutely love it. You might be the first one to jump into battle or just stub your toe occasionally for fun.