Ooh, great question! I actually love rereading my own fic; my motivation for writing is almost always "No one in this fandom is writing exactly what I want! I guess I'll just have to do it myself!!1!!" so nothing quite scratches the itch the same as my own work.

I have an "Author's Favorites" series, which happens to contain the fics I go back to the most. Though I don't tend to revisit the Dragon Age fics because 1) lingering fandom baggage and 2) IMO I've gotten a lot better at writing since then.