Issues with bite inhibition for starters, higher levels of sep. anxiety probably (those with more experience can tell you better than I), a harder time comprehending the idea of "no" since mom hasn't been around to teach it. It'll probably be a velcro dog extreme, which might be nice for you. I don't know you well enough to say.
But most of the dogs I've met that have been handraised or taken from mum too early have some form of aggression.