A380 - loved by the passengers, but for the airlines it only appeals to a select group of operators who can really fill them in and out of their major hubs. For most airlines the A380 doesn't stack up against economics and flexibility of the big twin-engine types. So in it's current form it has become a bit of a niche aircraft.
Reminds me a bit of the VC-10 - passengers loved them for their quiet cabin and smooth ride, but the airlines went for the economics and performance of other types.