I have to say, I like the names that do not go together... the ones that do sound too sing-songy for me. When I was in the hospital with my twins, the nurses said they were all grateful to see twins that were not named similarly. Apparently they had seen a lot of twins birthed at that hospital where some names actually either rhymed, or one child was named a favorite name of the couple, and then the other twin sounded as if they picked whatever, as long as it was similar... an afterthought, really.