I've only ever flown QR in J on the little LHR-DOH Airbus (A319 I think), The old style 777 and the A380. I like the A319 as it feels exclusive and quirky, I love the bar on the A380 but at 6'4" and 120Kg, The 777 seats are just so comfortable.

I've flown the RJ 787 and the AY and CX A350s and I don't see the big deal with the actual airframe.

My next set of QR flights are in November and are currently 777 and A380 AMS-DOH-BKK-DOH-AMS and over Christmas I am flying VCE-DOH-BKK-DOH-VCE on a mixture of 330, 340 and 380.