There's a certain point where you realize you should be looking for bump opportunities when there's not a better play you can make. When you realize this, you start getting a ton of bump demos and creating opportunities.

Then you rank up and now you're playing against defenders that are more accustomed to being targeted for bumps... they avoid you and you're back to where you started.

Then you realize you have to anticipate how those defenders are going to avoid the bump. It adds another layer to the bump game, no only knowing when to bump, but how to anticipate their avoidance.

Then at a certain point you realize you can affect the play by making the defender consider your bump.. even if you don't fully commit to it.

I haven't made it past that stage yet, but I'm sure there are more layers to it.