Some of my favourites:
Singapore Shanghi- works great and feels cosy and also got toast, eggs and coffee for like 1.9£ which is amazingly cheap, considered regular airport prices.
Hong Kong
Münich international (not the **** memmingen one)
Schiphol-I don't exactly know why I like this, I know I really like the area around the airportshuttle train station and they had this cool free area with huge bean bags and relaxing chairs which was great
worst:
Stockholm Skavsta - very small, horrible and stupidly boring. Had to stay there for 8hrs to wait for a flight leaving the next morning, it was dreadful. The prices are also a joke. I've lived the last 3.5 years in Sweden, so I'm ok with the regular price level, but here you pay like 12£ for a **** bolognese pasta or 5.5£ for a tiny additives filled "triangle" sandwich
Hamburg Lübeck is also very small. In fact I think the whole departures area was a huge tent. In fact the whole airport felt like it was going to be removed somewhere else in like two days.
Other mentionings:
I had a layover in Frankfurt on my way to Amsterdam and I had to get some food. I saw this food/restaurant area behind these stall kinds of structures where they had some officials and you showed them you're passport and just walked through and there was no signs anywhere (I know german enough to understand them). I went and ate and figured I can walk back the same way as my gate was like 40ft away. However for some reason you can't and I had to run and do this big loop, which was at least a good 3/4 of a mile long and then I had to go through the security again! which actually made me miss my flight (was there 10mins before departure), but I was so annoyed at the woman by the gate so I got a free ticket to the next flight, which was pretty cool I have to admit.
Hanoi and HCMC foreign terminals: I find it very discriminatory that the prices in the international terminal are like tripled from the ones in the domestic terminal... For example who can afford to pay 13-5$ for a whopper meal in Vietnam (ok technically the airport is no-mans land yada yada, but still), I think that's like about twice the price than in the US? and 3$ for water is pretty standard kind of prices in Europe, but I'm just thinking about the locals.
One great thing about the HCMC airport which I haven't seen anywhere else in the world was that they checked your id and the luggage identification tag before you could exit the airport and looked if they matched, which I think is a great idea (even if it took some extra time of course).
All in all I think most of the airports I've been to are pretty much the same.
