I love the older man/younger woman(girl) trope and even more so when the man is violent/evil/morally gray or bad guy trying to go right but sorta failing.

Not gonna lie, that dynamic definitely has its appeal. And I'm also a fan of Cassie/Nick from Push. That has the bonus of an older/younger pairing with some really nice power dynamics courtesy of Cassie's power and personality.

Rahl/Jennsen

Yeah, they were so awesome together. So fucked up, but so awesome.