Display a list of your material libraries, and even shared libraries on network

There should always be the possibility to revert to legacy UI, like going back to legacy Caddies, material selector etc...

I think there should be checkboxes to enable or disable new design features such as these, in the "Customize user interface" menu.

Most of the studios use different 3d app in their pipeline and they need to use fbx or other plugins to exchange their data for different apps. It would be handy if we have the one unique format to share between these apps.

I often create my diffuse, specular and bump maps off of one image in photoshop. When I bring them in to max, I have to resize all of them one at a time. It would be nice to have a way to set the size of all of them at once but still keep real world scale.

Similar to the preview window in the exposure control settings, I'd like to be able to adjust exposure control in my final render after the render is complete. This functionality is similar to what is available in other renderers such as fryrender.

You are unable to pan/zoom/rotate the viewport when there's a dialogue box showing (for a number of them)
eg mirror, array..

A dialogue box shouldn't prevent control of the viewport.

I like the way Max is going with its UI customisation but I'd like to see it go a lot further:

Everything; tools/buttons/viewports/stack panel/all bars to be customisable using a simple drag and drop technique.

All colours/sizes/fonts can be altered in a simple manner.

I'd love to see more tools created to aid hard surface modeling.

The Loop Tool commands are great for modeling (Straight/Curve etc) but the constraints don't work on them (Edge/Face etc). I'd like to see all constraints work for these and for anything else when possible.

I've explained it in more detail here:
http://www.polycount.com/forum/showthread.php?t=74939

A simple way to render with default lighting when there are lights already set up in the scene. It allows for quick test renders when scene lights aren't wanted.

Possible implementation: A radial box in the Render Window to switch between Scene Lights and Default Lights. This could also switch when changing the viewport setting: 'Illuminate With Scene Lights/Default Lights'.

For all existing and upcomming node based tools there should be an unified and intelligent designed interacting node Interface. Existin Tools to unifiy are: Slate, Scematic View, PFlow.
Following should be added:
Node based scripting and wireing (similar ICE or MotionBuilder relation contraint), Render management (like RenderFlow).
Especially Renderflow has a way better method for defining render-contetnt than the SceneState system.

An option for Ignore Backfacing, ignoring what is behind the selection rather than only ignoring if it's facing in the opposite direction.

I don't how many people know that max has an animation layer system. Maybe it would get more popular and more usable if it would get an interface like in Motionbuiler or Maya

Paul Neale's script will be such a great little addition. Even if its just added as part of the bonus disk.

http://paulneale.com/scripts/penAttributeHolder/penAttributeHolder.htm

enhancing viewport canvas to be something like maxon bodypaint, (with faster responce when using bigger textures, with projection things from part of image to a object, etc..)

Xray Unwrap using a great algorithm to auto pack uvs. It saves me dozens of hours of work and is very useful.

Textools is a great set of unwrapping tools but its a bit buggy.

If both toolsets were integrated into max it would yield faster better results for all artists.

http://www.raylightgames.com/2010/05/sneakpeek-xrayunwrap-15-rc1/

http://www.renderhjs.net/textools/

In AfterEffects and Premiere there is a slider which controls the overall interface brightness. I would love to have that in Max as well so I can dim it down a bit when working late hours. The viewports should be unaffected or have a separate slider I think.

Dragging and dropping any value from any parameter of any object to any other object's parameters (as opposed to copy-pasting values) - similar to the pickwhip in After Effects.

This is in no way saying I like the Caddies better that the old dialog boxes; however, the do look somewhat esthetically pleasing, but not practical. Anyway, if I am to be stuck with the caddies it would really be nice if someone would add a push-pin icon to the tool; that way they would not jump all over the place.