Mine are fibreglass with aluminum frames. I'd guess they are 30+ years old, but I inherited them, so I can't be sure. The only issue I've had in my 5+ years here is the chain on the motor has come off once, and the bracket that holds the chain has broken. I used a welder and junk-drawer finds to fix it.
I would recommend fibreglass for durability, but I would prefer something insulated. I might pickup some kind of kit to insulate it.
Also, I suspect a thief could easily kick a hole through it, but it would be very loud. I'm thinking of insulating it and using aluminum flat bar to hold the insulation in place, which would also act as guards to prevent thieves from squeezing through a kicked-in hole.
My dad has a NICE garage with, I think, a 12x10 door . It's insulated aluminum, 30 years old, and still as good as new.