Deterrent Question

I have a quick question for you. I know, I know, I don't normally post on Sundays. But since I've been slacking on getting anything out there, I thought I should get to it.

What is the one major deterrent for you when starting a new project. I know some people really struggle with picking yarn from their stash or choosing a pattern. So what is it for you?

For me it's this:

Trying to turn a beautiful skein of yarn like this:

Into a useable cake and I get yarn barf that needs to be untangled. So frustrating. It makes me want to just take a scissors to it.