I only follow like 10 people so far, and add them sparingly as I see people who consistently make great comments or submit content I like. The beauty of it is, when people I already follow share a link it shows up on my feed, even if they didn't submit it. Then I see them sharing content from other people that they probably follow, and since they are following those people, I more often than not end up following those people too after I see their name a few times and enjoy what they post. So I guess to answer your question, who you follow can build slowly over time, and always check out the global sections to find new people to follow! I probably ignore people equally to how many people I follow, because I am open minded to the good content I read, but don't want to see crap, so I tend to ignore people who argue a lot or submit content I have zero interest in on a regular basis.