You know what needs to happen? A Life On Mars/Quantum Leap crossover in which Sam leaps into Gene and in order to leap again he has to make Sam Tyler fall in love with him. Can you just imagine the comic possibilities? Like when Sam has to seduce Sam (there will definitely be some name confusion in the fic) and Al has to help him figure out how, so he just tells him to pretend he's a woman. This would inevitably lead to, as Haley said, "Night One: Candle lit dinner" And then after Sam leaps there will be a very confused Gene left with a very smitten Sam Tyler. XD Aw man, this is so awesome I might have to write it this summer.
EDIT: Haley just provided another idea for the fic. QuantumLeap!Sam would be really attentive and caring and nice to try to woo Sam, but it wouldn't work. So QL!Sam and Al would have to figure out another way for him to leap, so he leaps and then Sam only falls for Gene when Gene is himself. I think that is actually more realistic... but I don't know if realistic is a word I can use to describe a fic about a man who leaps into the mental construct of another man in a coma, so the man in a coma can realize that he likes the mental construct just the way he is. And now I have a headache.
EDIT2: OR! Sam would only fall in love with QL!Sam when QL!Sam loses his temper and starts shouting at him! Then QL!Sam could leap! And I should really just stop thinking about it!