I've been reading romance novels since the summer I was twelve when I got bored and picked up my mom's books. I kept it hidden from my dad for a few years, until my step-mom's mother brought some books over, and I confiscated them. Once I started earning my own money, I started buying my own books.
I primarily read the Harlequin novels, and look for stories with humor. I especially love the ones where the couple were friends, and then realized they were in love. (Sound familiar, anyone?
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Granted, it's not the only thing I read. My bookshelves are packed full with fantasy and "young adult" novels. Granted, a lot of them have romance in them, too, but that's usually not the reason I read them. It's just an added bonus.