A shame the A380 is given a good kicking generally over stuff like this ... it's easily my favourite plane in terms of flight experience ... I actually started enjoying flying again and when booking holidays or work flights, filtering flights specifically to make sure I got on the A380.
The A380 was a smooth ride, but oh so boring to fly on. But maybe I am weird for liking to fly on tiny things like ERJ135. In a A380 it's just 8 hours of noisy bus ride with way to many people.
8 hours of noisy bus ride? Weird, I never found the A380 like that and it's not as if I was up front or anything. Engine noice was minimal, fairly comfortable. Maybe just lucky.
Having said that, I recall a distinct difference between airliners. Qantas A380 wasn't as nice in comparison to the Emirates.