How To Pick the Right Carry-On Bag

You've probably been on a summer vacation and realized the bag you have is not really the best bag you could own. I know a lot of people bought a suitcase or carry-on (or both) years ago and have never replaced it because "it works". I'm a big bag collector. Not all bags work for all trips and I feel like I need to be prepared for most situations, so if you came to my house, you'd notice I have at least five regular sized carry-on bags and more than 10 personal-sized ones. Now, I'm not s...