Here is my list of demands for the Appearance Manager:

- Support for alpha-transparent pxm# images in appearance themes

- Ability to justify tabs in themes (always left-aligned or top-aligned)

- Support for vertical text, especially on right and left facing tabs

- Scale option for images in themes, instead of always repeating

- Animation of any element in themes

- Rollover of any element in themes

- Appearance control panel options for left grow boxes, 'X' style checkboxes, right-to-left styles, and double double scroll bar buttons present in themes

- Support for window growing from positions other than the bottom, right corner

- Support for custom mouse cursors present in themes

- Support for color variations in themes (similar to Apple Platinum and Aqua Blue/Graphite in OS X)

- Support for equations (add, multiply, sine, etc) in coordinate offsets in layo resources of themes

- Ability to change font face, size, and color in layo resources

- Better anti-aliasing

- Ability to swap out other system resources, such as strings, in the System File

- Ability to reposition the menu bar elsewhere on the screen

- Separate menu title item for the Apple Menu, which can be resized independently

- Alpha-transparent mouse cursors

- Ability for layo resources to "reach out" beyond their bounds instead of everything bigger than the original just getting chopped off.