No self esteem, low confidence, as others have said I have difficulty standing up for myself. I suppress my emotions, and I don't ask questions for clarity when something confuses me, because I wasn't allowed to cry or laugh, and I wasn't allowed to ask questions. I have the emotional maturity of a teenager because I was never allowed to express or explore my emotions.
I think I'm good for nothing and can't do anything right, because that's what I was taught as a child. I'm socially retarded because I was taught not to speak unless spoken to, and the things I say tend to come across as critical and judgemental, even though they're not meant that way, because that was all I heard growing up.
I'm sure it's affected me in many other ways, those are just what I can think of off the top of my head.