Well, Cmk10, mine would have to be my home airport, LAX. Why? Because..
Large exotic jumbos like EVA, Qantas, Cathy, Asiana, Varig, Air New Zealand, Korean, ANA, JAL, China Airlines, Air China, China Southern and Eastern, and of course my favorite, Air Tahiti Nui
It's next to the ocean and the planes roar over the pacific
Lots of charters like LTU and SkyServer
Plenty of L1011 and DC10 action
Cool cargo planes (Polar Air, Atlas Air, Evergreen, ect..)