@Sanjuro it is a thought-provoking questionnaire. I had to dig deep and really think about it. For a long time I couldn't identify my motivational fear so I assumed I didn't have one, but recently I've discovered that nothing unnerves me more than being seen as unintelligent or incompetent. I don't mind admitting what I don't know and I don't mind admitting when I'm not good at something, but when my expertise is swept under the rug, that I mind. So, I think my motivational fear is to be seen as stupid or incompetent, or rather to be treated as such.
How did I arrive at this? I analyzed some sudden and unidentified feelings I've recently experienced. No one saw on the outside, because I compartmentalized them so they wouldn't interfere with anything, but when I was alone, I took them out and worked through them. That's when I realized where they were coming from. I was unnerved because I felt a person I trusted and respected had asked someone else to do something based on the assumption that I wasn't capable of doing it. That stung me so deeply that I realized that at the core I want to be valued for my intelligence, for my knowledge and for my efforts toward an endeavor.