I guess my main concern would be that a homosexual couple might be overly sensitive to their children, as in I find it highly likely that they might be over protective of their children, or give them a semi-sheltered lifestyle, and if they did not subtely force a sheltered lifestyle onto their child, I'm sure the child would live one anyway. It's just weird, that's all. I'm sure they would not feel to comfortable taking their friends or significant others to their house to meet their homosexual parents.
For me, my dad is like my best friend and father. We talk about everything, drink beer together, you name it. My mom is very caring and motherly like. I don't talk to my mom the same way I do my dad, she has a feminine view on everything, we can't relate most of the time. I find it very important in raising a child they have both feminine and masculine influences in their life, because too much of just one isn't healthy in my opinion.