The One With the List.
Ross and Rachel's first kiss on Season 2 of Friends is one of the most iconic moments in TV history.
NBC
But they didn't get together right away because Ross was already involved in another relationship with his then-girlfriend, Julie.
NBC / Via Netflix
In order to pick between Rachel and Julie, Ross made a ~huge mistake~ by taking Chandler's advice to create a pro-con list about what he likes most and least about each of them.
In true Ross fashion, he forgets to make a list of pros and just comes up with reasons not to date Rachel.
NBC / Via Netflix