From the format of the question - I am assuming that you mean class by class. For me that means Club Europe and Club Word
All in all the pat answer would be "anything which is not Curry -as I prefer to have some feeling left in my mouth. I would probably say that in both examples the beast of chicken.On each occasion the meat was tasty and tender. For starters, I am a smoked salmon fan and then cheese for me. I would also say that at BCAL - which is now part of BA - my favourite away from First was the Beef Stroganoll. It was delicious as was the Afternoon Tea in First where there was Chicken Crumble. Why BA have never resurrected that I cannot believe as it is so good and it works in the ovens as well.
I have no favourite in Y or Y+ as I do not fly there and I am never in F as it is not available to those of us vowed to poverty.