There’s a truism that does the rounds in the U.K. quite a lot, which is that: Comedy is based on conflict.
I think that’s an over-simplification, or rather, it’s a step too far. I think comedy comes from difference. The friends in Friends aren’t in conflict all day, every day, that’s not what’s going on, but they never feel the same about a particular situation. They all have a different view on what dating is.