Trending should be all sorts of things. Amazing pictures. Awesome drawings. Cool stories. Posts about random shit in the news. Posts about people's lives.
If I had the power to raise things to trending, I'd just upvote whatever posts I thought were amazing and deserving. The thing is that what those are isn't like one particular thing. Sometimes you read something, and it's just amazing, and when you don't have that upvote power, you gotta seek people out and talk to your friends, and figure out if you can find anyone to curate it up there, because it is amazing. So I do that when I find those posts.