Wizzair- If you can get a decent base fare with them, they are good value for money. Nothing extremely fancy. Buy on board is a good selection and I enjoyed my snack and was happy to get a model A321. The new cabin interior is standard for most airlines in the late 2010s and I was happy with it for my 2 hour journey time. The bright but matching colours added some character to the plane. Would certainly fly again with them to Eastern Europe!
Luton Airport- Still going through lots of construction, improving and renovating. Makes getting around frustrating at times and also you never know what changes to expect if you aren't a regular (my last flight prior to this trip was in November 2016). The multistory car park makes for great photography opportunities if you got a minute or two spare. I was able to buy a pre-park ticket at a reasonable £30 cost for 2 days (one night).
Budapest Airport- Modern and has a brilliant viewing deck. Security was a nice breeze although a short wait was involved due to my A321 with 220 passengers coming in alongside an Emirates 777 with a good 300+ people.
Aeropark- A MUST for any Aviation Enthusiasts that pass through Budapest Airport, a rare glimpse for me as I never really got to see Soviet airliners much. Was really satisfying to get inside a TU-154!