"What's the most exciting project you've worked on?"
"What's your most exciting vacation?"
If I haven't already considered the case for such interview/icebreaker questions, I just don't tend to remember things on that axis since most of them kind of clump together around the origin. So if I want to even try and give an answer they were looking for, I have to do a random search through a bunch of memories and guess at levels. Or default to the first thing I remember regardless.