There's also a difference in preferring non-wheeled bags and not liking wheeled bags. I always seem to end up packing my Air Boss, even for longer trips (easily can pack 2 weeks much better than wheeled bags I have). But one of the main reasons is peace of mind getting my carryon onboard and have it fit in the overhead. If I didn't have to worry about that (or make myself not worry about it) I would sometimes prefer to use a wheeled bag. With the right strap and packing reasonably, I don't find the weight too bad.