It'd be nice to be able to mark favorites from the list of questions rather than having to go into each question.
What is meta?
- Any Stack Exchange user can ask a question
- The community provides support, votes on ideas, and reports bugs
- Your voice helps shape the way Stack Exchange operates
We don't do this for the same reason we don't allow voting from the question page; it's a conscious decision.
You have to click through to vote, because we don't believe you can cast an informed vote without viewing the full question and answer.
Similar rules would apply for favoriting.
You already have this feature: