It's possible I started with Harry/Hermione, I'm not sure - I just remember the Hermione/Snape and I have no idea how I got into it. Might have been through WiKTT (http://www.fanhistory.com/wiki/Snape/Hermione).
Especially since I tended to stay close to Harry centric fics. I think I mostly staid away from Harry/Ginny from the get go although there were some fics that I started that eventually turned into Harry/Ginny. I somehow never managed to stomach even the really good ones. (Amulet of Time by Luna the Moonmonster is such an example. I think I quit it either late into the 2nd one or early 3rd one because it became a relationship I thought was overly sappy)