"I tend to be a people-pleaser and it has made me fall behind in my work on occasion. I'm learning my limitations and learning how to say "
Preparing for this question requires a little bit of self-awareness and strategy. You don't want to share that you have trouble working with difficult people or that you struggle with the details, as those are key aspects of your role. What you do want to focus on is a weakness that you could possibly turn into a strength or share something that would not be detrimental to your role that you are working on improving.
"To keep from bringing work stress home with me I like to run outside during my lunch breaks. The fresh air and excursive helps me clear my mind and give my very best at work."
Humor, yoga or spending time with family. However you blow off steam, make it positive and not suggest that you fall back on bad habits when stress gets to you. Skip saying you don't have any work stress because we all do. Tell the interviewer that you understand the pressures of the job and that you have experienced similar pressure before.