I've really developed a liking for duffle bags. They're lighter when empty, are squashable if full of clothes, and don't take up a lot of space when empty. We used to use suitcases for all our trips, but they take up SO much space. On our recent trip to FL, I packed our clothes in a larger rolling duffle and a small rolling suitcase. I brought a smaller, empty duffle bag in the big bag to bring home souvenirs. It was the best vacation we've had, packing wise! Good duffle bags are quite affordable.