Given the nature of the content on Programmers.SE, I think some meta-tags would be helpful. Many questions are going to have specific topics of interest, but others are so subjective they necessarily encompass vaguely defined topics but are still on-topic.
One example of a tag I think would be beneficial would be poll. Assuming it's decided that asking people about their favorite X is considered on-topic (related discussion: What types of subjective questions are not acceptable?, it'd be really useful for people to add those types of questions to their ignored or interested tag lists.
A similar use-case could be made for humor and other similar tags.
I'd like to see those renamed or removed: they're redundant. It's assumed if you're talking about a language, it's C++ or Erlang, not French or Spanish; and every question on this site has something to do with programmers
Edit: Programmers tag removed, programming-tool renamed to tools.
I'd like to see this renamed to poll. Favorite is subjective and does not convey anything about the question: is it the author's favorite question? The taggers? Poll is specific and concrete.
Edit: Favorite tag is deprecated in favor of Poll.
These should be consolidated into one tag: careers and synonyms created for the other tags. There is no difference in the type of questions among these tags.