I was taking a look at the list of badges today and there's a few that no one in WB have managed to collect as yet.
So I took a look at the requirements for the "Generalist" badge where the wording confused me:
Provide non-wiki answers of 15 total score in 20 of top 40 tags
So what this means is you need 15 votes for any question that has tags in the top 40 tags.
This query will show your personal progression towards that requirement
I'm almost at that stage, and there's many people with higher reps and more answers than I, so I wondered why no one has the badge.
And then I'm told (thanks, Tim B) that there's a threshold for the number of questions per tag (top 40 tags need to have over 200 questions each).
Most of our top 40 tags are there; we just have four left:
All of these badges have 190 or more questions.
As soon as these badges each get to the 200+ question threshold, the "Generalist" badge should be awarded to those who have earned it.
So, creating a few valid questions with these tags (or adding the tags to existing questions, where relevant) will help.