Your luggage must go through some kind of abuse! Do you check them all the time? I buy my carry-ons (19"-21") at places like TJMaxx and Marshalls and they last for years with almost weekly travel. Then again, I rarely check my luggage.
I'll admit though that those leather briefcase/laptop cases wear out really fast. Luckily, my job allows a more casual look, so I switched to an
OGIO backpack and wish I'd done that sooner!