ARIA right at the top of the list. (ARIA -the animation-, ARIA -the Natural-, ARIA: Arietta, and ARIA -the Origination-) In that order. The torrents may be harder to find as the series was recently licensed, but the box set of the entire first season comes out in Sept, which I will immediately buy.

Kamichu! - Young girl in elementary school becomes Japan's newest goddess. Cute, lots of fun, very enjoyable. AniDB

Someday's Dreamers - Present day Tokyo, there exist people known as Mahou Tsukai (people who use magic or "Mages"). But, even though there's magic around, there's not much difference from the world we live in. Description from AniDB. A new series in the same setting just started. AniDB

Asatte no Houkou - A woman and a young girl switch ages due to a small wishing shrine in the town they both grew up in, the cause seems to be connected to their inner desires. AniDB

Honey and Clover - Seasons 1 and 2 AniDB and AniDB

Moyashimon - AniDB

Ouran High School Host Club - AniDB (despite this picture, it is a comedy, and nothing is what it looks like)

Shigofumi - AniDB

Spice and Wolf (Ookami to Koushinryou) - AniDB

Most of these series are 13 episodes or less. Two of ARIA's seasons are 13 episodes and Arietta is an OVA. Ouran would be the only series I listed that is 26 episodes.
[sorry the descriptions dropped off, I have to get to work]