I agree that premium pax may take more notice on what they are flying, but i would wager that the bulk of pax on their annual holiday run won't take any notice at all, unless of course the kids take a particular interest. I know a number of frequent business flyers, and to them flying is a necessary evil, but one they take as little notice of as possible.
Before I found you guys and developed an avid interest I've always been interested in which plane I'm flying on, I usually look at the nose or the safety leaflet to tell me!
Majoritively I've flown 737's as they're the budget airlines and the short haul ones - flew Virgin Sun with one of them before!
However I did a DC - 10 to Tunisia, 3 B777's to Perth and back and an Airbus A330 back from Perth on the second leg.
Personally I prefer Boeing.
When we were coming back from Dubai on the second leg from Perth it felt alot more rocky and unsecure - even though it's not it just felt it! I also much prefer the bins on any Boeing over an Airbus.
The DC was the first wide-body I'd done and was most excited about being on a 777!
I think I may have done some other Airbusses but I really can't remember!