And BA but I was 7 and all I really remember is that I flew a 747! *pines for pre 9/11 days when you could get on the flightdeck*
Yeah I managed to do that on a Transatlantic flight in a BA 747-400 too. Also flown with Virgin Atlantic and American Airlines, nothing really stood out from any of these on the transatlantic flights. There was something special about catching a Mad Dog out of ORD though. Just a pity I was too young to appreciate these things as I would now.
A favorite airline of mine would have to be Emirates. The best passenger experience I've ever had was on EK001 flying home to LHR from DXB on an A380. The seats are so spacious, great on demand widescreen IFE, great food, friendly and motivated cabin crew. Plus the pilots let us see the A380 flight deck and were really relaxed about talking to us for a while (in fact the airport held back an extra shuttle bus just for my friend and I that we were talking so long). Their 777-300ERs were also a great experience. Their A330s were a bit dated and weren't as great.
I also love flying Turkish Airlines, whenever I fly over to Turkey I have a great experience. Even though it's usually on an A320/321 you can enjoy the 4 hour flight in comfort and there is great food and plenty of drink. I think they won a SkyTrax award for their catering last year. Nothing beats crossing Eastern Europe in the emergency exit row of A321 with some nice izgara kofte and an Efes. I've yet to catch their 777-300ER out of LHR, or use them to fly further afield. Plus I've got my Miles&Smiles card to build air miles within Star Alliance.
For my final mention I will say that I've had a nice experience with CityJet. I usually fly to Ireland with Ryanair from Luton or Stansted to Dublin or Knock. However, it turned out that I could fly with CityJet for the same price, at the time I was booking. This was great for me because I got to use London City airport, where you can get from the entrance to your plane in under 15 minutes, so cut out some hassle (and let me tell you, flying the steep approach was spectacular). It was nice to get snacks and drinks even on such a short flight. Plus for all of those who really know me on these forums, they fly Avro RJs so you will know why I was so excited. Plus the crews were very friendly and I got a flight deck visit on both legs, chatting with them for a good while. The BAe 146 proved to be a very capable aircraft. So not one of my favorite airlines (yet) but definitely thought they were worth a mention as it was something special to me.