When I tried to get the 'research assistant' badge on sci-fi, it linked me to this 'interesting tags' page.
But on meta it sends me to three tags pages.
Why is that? Is scifi special?
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Research Assistant requires you to edit 50 tag wikis. Tag wikis are supposed to be thoughtful introductions to a topic, which are therefore best written by someone who is at least vaguely knowledgeable about the topic.
Your favorite/interested tags are presumably at least correlated with topics you know something about. Hence, linking you to your preferred tags is a good place for you to start editing tag wikis that you know something about.