I'll add mine now.
Heat & A/C (although, I's use the A/C sparingly)
Most of the floor would be a standard striking mat floor. A small area (12' x 12') would be a thicker mat flooring for throws & grappling techniques.
Mirrors on opposing walls. 3/4 the legnth of the wall.
Century "Cornerman" bag holder holding a 6' bannana bag.
A humidified 6' x 6' closet for leather sparring equipment, pads & paddles, etc.
Bookshelf to hold reference material.
Flat pannel TV w/ dvd & cam-corder to tape forms & techniques.
Treadmill for days it's just too cold to run outside.
10' section of Ballet bar along one mirrored area.