I'm not a big fan of straight romances, because they tend to be upsetting, but I love a good romcom:

• Houseboat
• Father Goose
• Bring Up Baby
• African Queen
• Princess Bride
• You've Got Mail
• French Kiss
• Amelie
• Charade
• Sabrina (both versions, for different reasons)
• 10 Things I Hate About You
• Knight's Tale
• About a Boy
• Bride and Prejudice
• The Cutting Edge
• Greencard