I don't really mind how big or how little the age gap may be as long as the girl is older. I also don't mind whatever genre you throw at me as long as it's not hentai =))
**or they could be the same age/the guy could be older as long as he LOOKS younger (i.e. Lovely Complex, Shibatora etc.)
Attached is a database of mangas of this genre that I've read/plan to read etc, I've put in comments as well~