[pkamb]

I'd love a search engine that mainly searched Stack Exchange, (old.)Reddit, and some subset of blogs or single-author websites.

Especially removing Quora, Pinterest, and aggregation/reposting/SEO/affiliate blogs.

And all "product" images with a white background. Only show real photographs.

[dredmorbius]

Setting specific site restrictions (only one applies at a time, e.g., "site:example.com"), or utilising DDG bang search, gets close.