I prefer reading them. Therefore, I prefer writing them because I understand them best. Plus, as I stated before, I'm just plain immature.
Actually, way, way back before HP (1987

) I wrote a (very crappy) book. My husband jokes she stole my idea because I had a a ghost named Harry.
For me, reading to my kids is what got me back in the game. And yes, I fell head over heels in love with HP. Especially after reading all three of the first books OUT LOUD with a British accent to my daughter. (then I read my own to her and had to perfect a Scottish accent...poor kid).