Few things I have always wanted in a search engine -

- Filter out news/SEO'd sites. Better if by default. - Specialized categories - software dev, real estates, travel, garden, finance, .... - More weight on verifiable authors. Eg. blogs, publications, good quality social media posts (quora, reddit, linkedin), etc. - Geo-temporal-social context in search. Able to navigate results by time and space easily.

Also, might be good to have search engine interface be like an app than a website. The secret search features should be upfront and interact-able.