Anime with older characters

Can anyone suggest anime (not Hentai) with mostly over 18 characters?  Like these?

- Honey and Clover
- REC
- NHK
- Genshkin

It seems to me that most anime w/ young-mid age characters fall under 'slice of life' category. I also like these types of anime w/ older characters, usually around college age. Recently its become aware to me that I dont really like the fantasy type anime, it looks too.. bubbly and such.. howver I do feel like I can relate to anime w/ college age'd type people. What is REC btw? I've know of the other three, all of which I enjoyed Very much.