Most of the films I love the couples absolutely wouldn't last!
Tom cruise alone would leave a path of destruction...
Top gun - no way Charlie sticks around to play little wifey to a mere pilot given her own status
Color of money - carmen will quickly realise a hustler is not a husband or father figure type
Cocktail - shotgun wedding, mismatched people from different backgrounds and cultures, she'd get sick of slumming it and him leaving all the wifework to her especially raising the twins, he'll get fed up with the pressure to provide and her complaining he's working too much
Days of thunder - she'd quickly realise she's far too good for some arrogant, adrenaline junkie
Minority report - the issues that split them up are still there at the end of the film, few couples survive the loss of a child
Knight and day - he'd get bored and want to get back in the spy game, for her worrying sick about him due to his job would soon get old
Rock of ages - again shotgun job if they're even married at all, he'd soon bore of fatherhood and she'd be fed up of his lifestyle and his not being there with his family.
Others
Ferris bueller - they're just kids and even ferris himself recognises the idyll of high school life is coming to an end and that will likely mean the end of his relationship
Officer and a gentleman, he's still got so much damage due to his childhood unless he got loads of therapy that's unlikely to work
Highlander - that's one hell of an Age gap! 
Armageddon - I think she'd resent him living instead of her dad and his survivors guilt would end that
Point break - started with him lying to her about everything, she'll never trust him
Just my thoughts