I'm 31 (almost 32) and love writing fanfics. My first one Not Myself was one that had been running through my head for a few and weeks and once I sat down and wrote it I found out that I loved writing them. The aforementioned fanfic is a HP/GW ship. That is the only ship I can write from Harry Potter. I've attempted a HG/RW one before but it went nowhere. There are only six other ships that I do. They are:

Rory/Dean-Gilmore Girls

Kyoya/Haruhi--Ouran High School Host Club

Usagi/Mamoru--Sailor Moon.

Booth/"Bones--Bones

Karl/Sarah--Love Actually

Willem/Allyson--Just One Day/Just One Year

I know that's not many but I've attempted other ships (ex. Ron/Hermione) that eventually were mere ramblings or that I gave up on entirely. Between all of these shippings my favorite ones to write are Ouran and Harry Potter ones or rather these are the only two that I get ideas for that lead to anywhere.