I have been part of the beta test for kagi search engine (kagi.com) and my favorite feature is you can prefer/mute websites. So for example I prefer MDN so the site is ranked higher if it shows in the search results. Note I’m unaffiliated with them but the product/team is great so rooting for them to succeed.
I'm using Kagi at the moment and not only does it have nice features like this but it is also a fantastic search engine.
Maybe the best way to explain how fantastic it is is that I think it has a bang operator like DDG but I have never tested it because when I look at the results they are obviously better than DDG or Google.