5. Options are nice. There's a school of thought that says you should date a few people at the same to get an idea of what YOU like. On top of that, a little jealousy and romantic competition isn't a bad thing. Through the years, AC Slater, Jeremiah Lasky and that bozo from The Max keep Zack on his toes for Kelly's affection. Read: New York Women To Learn How To Find The One By Dating Three At Once
6. Sometimes when it's right, it's right. Zack and Kelly managed to chase each other around high school, college, a cruise ship and Las Vegas for half of a decade. Eventually, it's time to stop pussyfooting around and make it happen. And Zack took the bull by the horns by proposing to Kelly rather than letting her get away. Though his parents objected to the quickie wedding, Zack, Kelly and company went through with a Vegas nuptials cum series finale/ reunion.