Wouldn't it be awesome to be able to rate the quality of problems? Then you could sort the problem set by quality, where I define "quality" of a problem as having some (or all) of the following properties:

• the statement is not long and boring and irrelevant
• the solution is not evident
• the solution involves some interesting insights
• the implementation involves some tricks that might prove useful for other problems
• the tests are properly crafted to avoid flaky/lucky solutions to pass
• whatever else you might consider

Before the hordes of trolls and Xellos take care of this post, I want to state my awareness that quality is quite subjective and the aforementioned trolls may as well jeopardize this rating. Still, I trust the community and I believe this idea would be helpful for many people. I would love to hear your opinions!