Favorite Answer:I was born overseas and have funky birth certificates. I've had a passport since I was very young, and because of those funky birth certificates, I NEVER let it expire. I travel more than most people, so it's necessary for me. That said, I think there's something very romantic about having a passport. It's like a ticket to the world. Maybe you don't plan on flying to France next week, but if you have a passport, you could.
You should also find out if your state is a "real ID" state. Mine isn't, so I use my passport, even when I'm flying domestically.