What do you folks think of aluminum sided trailers?

Floor plan, floor plan, floor plan, what it is wrapped is comes later. If you live in the hot sunny south, you chance delamination and as mentioned, hail is the bane of aluminum.

Aluminum is old school, well established and easy to repair. It will be around for a long time to come. Flat panels are also well established and lend themselves to detailed artwork. They too will be around for a long time.

Living in Indiana, so I have no particular preference between the two.