If I'm reading a script, and I'm not buying it, I need to be able to relate to the character on some level, and they need to have more than one dimension. I need to have an idea of what this guy's thinking about when he's taking a shower not on camera. And if I can't picture him taking a shower and getting dressed, then he's not a real person.
People who work with me think I should cut my hair. They say casting directors are less likely to hire me with long hair - that they don't have imaginations and can't picture me looking normal. People literally have conference calls about my head when I'm not around. I mean, obviously I would cut my hair for an amazing part.