I studied AE in college years ago, then started using it professionally about 2 years ago.
I have a membership to Lynda.com and Total Training, and have watched all tutorials. I have the Expressions book by Geduld. I even do some of Andrew Kramer's and Creative Cow's tutorials, and have become better over time. "Creating Motion Graphics" is cool, but a thick book.
The issue is that there's so much to study that I can spend a lot of time studying, then get a project that requires a method that I didn't study. Relate? Can you ever earn a black belt in AE, or are you a master at what you use MOST?
Trying to learn as a project is in production with a tight deadline is nooooo fun.
What are AE artists expected to know vs. skills for personal advancement (that I can study later)