I think that might be me. I have a gift (curse?) of blocking things out. It's not very good sometimes, because if I'm on the phone, or reading a book, I don't hear anyone around me. I shut them out, and focus on what I'm doing. It really does drive my hubby nuts. And my kids.
I think morning might be the best for me, now that I think about it. Especially after the kids have left for school and the house is quiet. Except for my three-year old. Can't exactly block him out. ;-)