Touch the Parade
This seemed like an AU to me at first, but the writing was so good I kept reading and eventually things fell into place for me.
It's got some very interesting Sasuke characterization, and all in all, it's a good tale. The use of the Tarot is particularly inspired, and it's a good look at what a country might be like outside of the Five Villages.
Card Captor Sakura
This is an older fic, but I find myself going back to it now and again because it's so well done. It features Eriol and Tomoyo corresponding throughout the years and gradually falling in love. It's a part of a larger universe (all of which are recommended!).
The little details, like Eriol's writing paper, make me smile. The characters just really come alive.
I have never laughed so hard at a Bleach fanfic. Rukia discovers manga... and decides to use it as a study guide. Since she's notorious for her lack of artistic talent, it struck me as very appropriate fro her to learn through these kinds of aids.