I have a couple of favorite airports.
TOC, where I got my private license, is a scenic airport nestled in the edge of the NE GA mountains.
Sebring FL (SEB) is a cool airport that is within the track of the Sebring race track. They have a nice restaurant as well as an aviation art store.
GSP is one of my favorite places to commute through. It is very easy to get in and out of, and also has a good restaurant with employee discounts. It isn't extremely busy and welcomes GA aircraft also.
As far as working airports, I'd have to say that JFK is one of my favorites. Even though it is a busy airport, it is very efficient and my delays there have been minimal. The VOR approach to 13L and R is very cool. It's the one with the lead-in lights that turn you toward the runway. I've never seen anything like it anywhere else. I frequently see a lot of interesting and rare aircraft there as well, including numerous Concorde sightings.
ROA, Roanoke VA, is another cool airport that we fly into. Where TOC is nestled in the mountains, ROA is surrounded by taller peaks. It is a challenging airport with relatively short runways. In fact, ROA approaches are used in one of our most sweat-inducing sim sessions.