Albus is a hard one I think. I personally see him in either Hufflepuff or Gryffindor.
I think that the majority of us agree that he would not be in Ravenclaw. From what we see about him in the epilogue he doesn't seem as though he is all that smart.
I also don't think that he would be in Slytherin because he really doesn't seem all that cunning. From what I read in the books I really don't think that he would be suitable for there. His personality just doesn't say Slytherin to me. Though you never know. Harry himself would have done well in Slytherin. Maybe his son inherited some of the same things and will also do well there. Though that is only a what if and is definitely not a positive thing.
Therefore I am pretty sure that he is in one of the other houses. I think that since he is a son of Harry and Ginny that he would have all of the traits of a true Gryffindor. He might not look like it because of what we see but look at Neville. Neville looked like a Hufflepuff but he turned out to be a true Gryffindor.
He could also be a Hufflepuff because of the fact that he seems true. Sure he was nervous but he seems as though he is someone who would never dare betray his friends even if his life depended on it.
~Alyssa of hermione4lif