I would just like to create my own groups. As another user said, tagging would probably be gamed by SEO companies, but if people could use their own groupings, that problem wouldn't occur. Their could even be curated lists out there of specific sites that fall within a general category. At the least, I'd like to be able to block sites from ever appearing in my results. I've used add-ons for that which work pretty well, but it should be built-in in my opinion