I've seen so many people requesting avatars and signatures, selecting low quality renders like this:
But what you want to do to "filter the crap" is this:
Click the "Search Tools" button, found below the search bar.
Then click on "Any Size" and go down to "Larger than" and click on "2MP." (Some say this is too high, but that's my render quality standard)
Here's the result:
NOTE: Include "Render" in the search term, as a surprising amount of people do not. <_<