Originally Posted by
thepaxman
I'll try. But usually the flight attendant is standing in the doorway so a quick "thanks" is all I can get out. Plus, with so little room in there I'm afraid you guys will bang your head on something while contorting yourself to face the cockpit door

Thank you paxman - very nice comment indeed.
If you ever want to say hi after the flight just ask the flight attendant if you can say hi to the pilots up front and he or she will surely let you do it...
(PS best to wait until most people have deplaned so you don't block anyone from exiting the aircraft)
Don't fly people anymore (UPS) but when I did we always enjoyed saying hi to a friendly soul...