I've also been in the situation where I'm on the umpteenth interview with the company when the "Do you have any questions?" question comes around. I try to have

I've also been in the situation where I'm on the umpteenth interview with the company when the "Do you have any questions?" question comes around. I try to have at least one question about the company where the answer might vary from person to person. Something like "What's one thing you'd like to improve about the company?" or "What's your average day like?" Even if interviewers compare notes, I don't look weird for asking the same question, and I don't have to awkwardly admit I don't have any questions.