Not sure if anyone's mentioned it before, but seeing the same stuff in the popular section every day is kind of boring. Sure, you can add specific tags, but it'll still be all the same stuff. That said, I think it would be cool to have them refresh every day or every week or something, and maybe throw in time-based filters (most popular today, yesterday, this week, month, year, all time, etc.), more or less the same thing as imgur. It would freshen up the experience with the site to open it up each day and see different cool things on the rise.
Also, I know you can look in the Fresh section and try tagging to filter things down, but at the moment a lot of it is import dumps from artists and it's often difficult to get past their wall of material if you don't want to see it anymore.
Customer support service by UserEcho