Me too but I only read the first three books. I should start reading the fourth one :) Yes, many of the names were variants of names that already exist and I didn't like many of those either. But some were really nice :)
Sansa is one of my favorites. I think he made some of the names up. But I think everyone also thought he had made Sansa up. But it seems to have Iranian/Indian roots.
I also kind of like Eddard but not enough to use. I know Cersei is just a different spelling of
Circe and then Catelyn is a variant of
Caitlin. I also kind of like
Bran. But I still prefer
Harry Potter over Game of Thrones even though I like both :P