You’ve laboured over your new campaign for months, meticulously going over the various details of the world. You’ve planned out the campaign’s major points and can’t wait until the PCs are required to rescue the Twilight Princess from her prison in the Nine Hells.
As you reach that pinnacle in the campaign you realize something disheartening, your PCs don’t really care. All the work you’ve done, all the creativity and detail you’ve put into this grand moment is going unnoticed by your PCs.
They haven’t bought into the campaign.