How Do You Find Interesting GitHub Projects and Repositories?

You can use github topics for technologies you are interested in which act like hashtags on other social media sites. If you are looking for curated lists, start here:

https://github.com/topics/awesome-list

If you are looking for a single page option, check this out:

https://project-awesome.org/

I typically discover repos through p2p sharing, looking up a solution to a specific problem, and hanging out in my favourite programming languages' communities on socials. People also share things they have built in hobby communities, blogs and youtube.