Colouring and user-order of font menu
User customized font menu. Colours and the ability to order the fonts exactly how you want. . This makes it so easy to slide to the part of the menu to grab a font you know. This was done in the 1990's by Now Utilities on OS7, 8 and 9. Bring it on!!! It was SO fast to find your fonts. I had blue for Serif, red for San Serif, green for Script and so on. Colour coding is great for many features.
Could also be helpful to give feedback to Apple as well. Surely Apple could move nonessential fonts out of the protected part of the OS and allow us control over which fonts we want installed like in the "old days". Maybe if they hear from enough users they might consider a change to how they currently treat fonts. Give feedback to Apple here: https://www.apple.com/feedback/
A customized font menu would be one way to get around the fact that newer versions of the Mac OS don't allow us to remove the 100s of System Fonts installed. Perhaps this could be done through menu customization in Adobe products?