The reason why my messages page rarely looks like that,is because whenever someone makes a picture for me,I like to just leave it there,instead of removing it from my messages after favoriting,commenting and downloading it. XD
I used to do the same too. The problem is you never knew when you got new messages. Not to mention it was easy to lose any message among the others. That's why I'm constantly fighting to clean my inbox.
It's quite hard to manage so many friends... So many messages... It really takes a lot of time from us, but it's something which at least is good. Read the comments from our friend and reply them is quite funny. That's why I love Deviantart. Because of the site I never needed to make any account in Facebook.
I like DA for the same reasons. But,still I have an FB account as well. Reason being,some of my friends are more active there than on here,and,some don't even have a DA account...
But,that's not the point. Point is,you've finally made your inbox clear again. (Something I've just finished doing myself. XD ...Though,I imagine it's harder for you to do that,than it is for me,sooooo...)