One of the most important but also tedious parts of traveling is the airports. They can be a delight, or they can be a living nightmare. I usually rate an airport on 2 very basic parameters. Amount of and cleanliness of toilets, and access to outlets. Food options, comfort, architecture etc. goes in second line.
There’s no rule that the bigger and more busy airports are the best, while the smaller ones are worse. It varies wildly.
Here’s the list of airports I’ve had the pleasure of staying in.

Armenia, Yerevan, Zvartnots International
Austria, Vienna, Vienna International Airport

Belgium, Brussel, Brussels Airport

Cambodia, Phnom Penh, Phnom Penh International
Cambodia, Siem Reap, Siem Reap International
Croatia, Zagreb, Zagreb Airport

Denmark, Copenhagen, Kastrup Airport
Denmark, Billund, Billund Airport

France, Paris, Charles de Gaulle Airport

the Gambia, Serekunda, Banjul/Yundum International
Georgia, Tbilisi, Tbilisi International
Germany, Frankfurt, Frankfurt Airport
Germany, Hamburg, Hamburg Airport
Greece, Athens, Athens Airport
Greece, Thessaloniki, Thessaloniki Airport

Iran, Esfahan, Shahid Behesti Airport
Iraq, Erbil, Erbil International Airport
Israel, Tel Aviv, Ben Gurion International Airport

Latvia, Riga, Riga Airport
Laos, Luang Prabang, Luang Prabang International
Laos, Vientiane, Wattay International Airport
Lebanon, Beirut, Rafic Hariri International Airport

Macedonia, Skopje, Skopje Airport
Moldova, Chișinău, Chișinău International Airport
Myanmar, Bagan, Nyang U Airport
Myanmar, Heho, Heho Airport (Lake Inle)
Myanmar, Mandalay, Mandalay International Airport
Myanmar, Yangon, Yangon International Airport

Netherlands, Amsterdam, Schiphol
Norway, Oslo, Oslo Gardermoen
Norway, Svalbard, Longyearbyen Airport
Norway, Tromsø, Tromsø Airport

Oman, Muscat, Muscat International Airport

Poland, Warsaw, Warsaw Chopin
Portugal, Lisbon, Portela Airport

Romania, Bucharest, Henri Coanda International
Russia, Moscow, Moscow Sheremetyevo

Senegal, Dakar, Blaise Diagne International Airport
Singapore, Singapore, Singapore Changi
Spain, Malaga, Malaga Airport
Sweden, Stockholm, Stockholm Arlanda

Thailand, Bangkok, Suvarnabhumi Airport
Turkey, Istanbul, Atatürk
Turkey, Istanbul, Sabiha Göcken

Ukraine, Kiev, Kiev Borispol
UAE, Abu Dhabi, Abu Dhabi International Airport
UAE, Dubai, Duabi International Aiport
UK, Edinburgh, Edinburgh Airport

Vietnam, Da Nang, Da Nang International
Vietnam, Hue, Phu Bai Airport
Vietnam, Hanoi, Noi Bai International