The Bad Boy. This one will probably steal your heart in your early 20's, in those years when you're trying to figure out who you are and who you want to be, and discovering your wings seems to come with a side of rebellion. You'll think you can change him, but you can't. (And secretly, you won't want to, because if you did, he'd no longer be the boy who stole your heart.) He'll make you cry as much or more as he makes you laugh. Underneath it all, you suspect he has a heart of gold…and he probably does…but it will take years and many women after you to uncover it. Here's the thing about bad boys: In the end, they always walk away. But they don't leave you empty-handed. In their wake will be a girl who now knows what she wants out of love and what she won't ever again stand for. And she's finally learned how to say "Thanks, but no thanks" to anyone who doesn't meet that standard.