Is it normal I like to go for girls/guys who have low self esteem?

Personally I prefer girls kind of like that. I can't say why you and I like women (and in your case guys as well) with low self esteem but if I had to guess it would be because people like us have been in similar positions and know what its like. I've been depressed before and I remember taking every opportunity I could get to tell someone how I feel, even if they weren't listening. I think you've also had your share of feeling alienated and wanting someone to hear you out, so that's why you go towards people with low self esteem, because you know what its like to be there and want to help. This is just a theory; but it's one that I'm basing off of my own reasons for wanting a person with low self esteem. We're both helpers, you and I, but who's shoulder do we get to cry on?

Side note; I think I'm broken, and I partially want to say the same about you. We look for other broken people because we want meaning in our lives, we want to help others avoid becoming like us. If what I'm saying doesn't relate to you, then I truly (and I seriously mean this) apologize for calling you broken.