LOT - solid, but nothing more than that, improvement through the couple of years is noticeable
RyanAir - cheap airlines, good only for a short-distance flights or when your budget is tight, anyway don't expect any fireworks
Lufthansa -
very recommended, when flying with them, I always gotta feling i'm someone important and they do care, not the cheapest but the quality comes with the price, 'Ordnung must sein'
British Airlines - great business class with superb entertaining part, but nothing more than that
Emirates -
, same thing that with Lufthansa but the stewardesses are prettier, top quality handling, never disappointed me
KLM - expensive, quality/price ratio is unprofitable
Air France - very solid, good business class, probably with the best menu you can get, great staff
Virgin Airlines - always on time, very aesthetic insides, helpful personnel and the best part is the price