Not much to add here as I don't know Air Gear, but Reborn must look stupid to a Code Geass fan, eg. Realms although she does almost ship one character the way she ships Lelouch, which is something. The first seven books (background info) will probably squick you and the hero is your typical shoujo manga heroine with not strong enough character to keep the whole cast together. The saving grace is the visuals and one or two side characters. I guess it's pick your poison? =D

That said, I'm sorry for my Reborn-related spamming XD.