I generally try to clean up after each project. I guess because I'm such a messy sewer and have such a small room (8x10) that serves multiple purposes I just have to have a 'jumping off' point for each project. Mind you, during a project - unless people are staying over - I'm fortunate enough to be able to just shut the door and leave everything where it is mid-project.
And trust me I seriously doubt you are a hoarder. I've known a family like that. You don't even want to know what a disaster that was!