Show the interviewer that you work well with most personalities even though you recognize there are some folks out there who are quite difficult to please.
Think about that one person at work who is seen as hard to please. Perhaps there is someone at work who tries to intimidate others. Talk to the interviewer about what made this person challenging and what their relationship was with you. Avoid speaking poorly of anyone and be sure to end your response on a positive note.
"I once worked at a locally owned shop where the owner was very demanding. When the owner would walk into the store, employees would announce over their headset system that the owner was in the building, so that everyone could be prepared for his entrance into their department. The owner had great intentions; however, his people skills were a little rough. I could see that he meant well, and I recognized that he wanted to do a lot of good things. When we interacted, I always took his feedback with the understanding that he didn't mean things as harshly as he might say them."
"I struggled most with the new VP of Sales at my previous company. She was brought on with no experience in our industry and seemed to have little interest in it To win her over; I invited her on a business trip for an out of town client. I wanted her to meet my clients and spend one-on-one time together. We bonded as humans, mothers, and sales executives. She learned a lot about the company and industry, and I learned a lot about what skills she brought from her previous roles."