Jobs where the expectations of the position aren't clear. The person hiring you should be able to give a clear idea of your responsibilities are day to day in a practical way. It shows that the company understands what it wants out of the position.
I've worked a couple positions that had a really hard time figuring out who was supposed to do what that lead to a lot of confusion and both of them had this in the interviews. If the company you're working for can't define what success in that position looks like you won't be able to either.
A former workmate invited me to interview at a startup once, for a new position of "Director of Support".
Between the invite and the interview, the title of the position changed twice. When talking with management and then the technical director, they all seemed to have grand-but-fuzzy expectations out of the position... but I got the sense that everyone had their own idea of what the position was going to provide for them.
When asking my would-be boss for specifics about what my day-to-day role would be, he kept turning the question around: Well, that's what we are looking for YOU to answer!
He was one of those Elon Musk types who seemed to have a game of 4th dimensional chess going on in his head, but not enough communication skills to adequately express it- or else he would give you some weird Socratic question as an answer. Yeah, I'm an IT guy and I like solving problems... but solving my boss isn't one of them. Hard pass.