With things like job applications, I have to convince myself I could do the job, I could want the job, I would be able to commute to the job, and someone might consider me for the job, before I can sit down and try to convince anyone else, via the cover letter, to consider me for the job for even a moment. I don't want to hang a picture or pick out new curtains until I know all the other pictures I'm going to hang and what the new duvet cover will look like. It's all or nothing.
With the jobs I already have, this can translate to deep (and undeserved) loyalty. The better I know the job, the less likely I am to leave. Inertia is a powerful thing.
Loyalty is not a bad thing. If you're my friend, I want you to be my friend forever, and I'll do what I can to make it so. If taught convincingly, a lesson is set in stone in my mind. Perfectionism, though—I've been warned against it my whole life. It's a great way to get nothing done and go nowhere. My family taught me that.