Aluminum Siding question.
OP, to answer your question our first camper was aluminum and we didn't regret it.
Our current camper is fiberglass. We just decided to switch it up.
The fiberglass is easier to wash and wax but not a huge difference. The bigger difference is the look. I've gotten compliments on how nice the smooth sides and tinted frameless Windows look everywhere we've camped.
I think the main things that keep people away from fiberglass are the additional cost of the option and the additional weight.
2017 JayFlight 28BHBE
2014 JayFlight Swift 264BH (Sold)
2007 GMC 2500 Sierra Classic Crew Cab LBZ Duramax / 6spd Allison