That way you will find that whatever one of them does then the other will suffer in one way or another. When you are thinking of lead characters then always make sure that they both have different personalities and similar if not the same goals. In a romantic comedy screenplay you will usually find that the two lead roles are very different from each other and it’s this clash of personality that causes drama and humour. If you don’ want to use a stereotype then you need to pinpoint a certain problem that character has an exploit it in every way possible, making whatever his/her goal just a little bit harder. If you decide to stereotype your character then you already have an idea of what they are going to be like and the audience will already be able to relate to them. Very often comedy characters are based heavily on stereotypes. The three main things you need to have in a romantic comedy are strong comedic characters, characters with opposite personalities and an engaging plot line. Situation comedy is where the character says or does something and makes a fool of him/her, a good example of situation comedy is The Office. When you find what your characters traits are then you can use this to your advantage and create situation comedy.
A good romantic comedy usually contains someone annoying and frustrating to the audience and it’s their inability to change or act “human” that draws us in. If you want to write a romantic comedy screenplay then the first thing you need to think about is character.