Improve the display of DiffChange
Fix completion menu for cterm
Fix diff delete in color terminals
Nicer cursorline colors

Enable with :set cursorline
Make folds more subtle, were too bright
Add custom LongLine coloring for lines over 80 characters
Make status line for active window less colorful
Make line number coloring in GUI match terminal. Use Vim 7.3's ColorColumn property.
More personal tweaks