I abselutely love the lights on the inside of the TARDIS
http://www.youtube.com/watch?v=H8tO9LG52NQ
The best shot of the lights on the walls and ceiling is at 1:20
My feature request is that the walls and ceiling and underneath the console could have flashy lights and what-not. I LOVE flashy lights.
I feel it would give that more Wonderland kind of feeling when your inside the TARDIS.
Matt If you implimented this I would drop to my knees (Cartoon Style) and scream as loud as could,"I love you Dr. Matt!"
(I love flashy lights)