How on earth as a passenger do you assess an aircraft from within a fleet to become a favourite ?
Why
wouldn't passengers have a favourite? They're the ones that have to sit inert and bored for hours on end and start to notice the little quirks.
There was one of Jersey European's F27s that I always preferred (
G-JEAI? Was that it? Long time ago ) because the props always seemed to stay in sync better than on others, therefore preventing that head-splitting out-of-phase effect.
I also have their 146 G-JEAM stuck in my head for a reason but can't remember why. It must have had some annoying quirk; perhaps it whined more than usual.
Edit: also I've heard passengers mention that Aer Lingus' A330 EI-ORD never 'rode' right after it had a run-in with bad turbulence. Never flew on that one myself but eventually it was scrapped, only the second A330 to meet that fate.
Some passengers are more observant than an LD3 container.