Cheers
Sam (Ted Danson) and Diane (Shelley Long) had a bitter relationship at the beginning of Cheers. They butted heads quite often, but that made fans only want more. Even though their love-hate relationship made for great chemistry that fans desired, their big kiss at the end of season two was definitely a surprise! It was only fitting that they shared a kiss during an argument.
Pretty Woman
The relationship between Edward and Vivian is truly the definition of opposites attract. Vivian is airy and fun while Edward is cold and distant. Honestly, that's probably why fans were so interested in them and wanted to see them succeed. The kiss was well warranted!