I hate to admit it, but I love romance. This list has great storytelling and characters, and plots ENTIRELY centered around relationships. (or nearly entirely) Tone isn't discriminated against. Serious, dark, fluffy—whatever! Some of these aren't even actually my *personal* favorites, but they're just too good to leave off. This is just sweet, strong, and compelling stuff.
P.S. This list doesn't prioritize smut—if you want to see more XXX, check my other list. Goofier stuff is over there. :)
