Would love the option of hiding or removing titles from my library. Seems like a feature that's been wanted for some time now by the community.

I second this.  I have a lot of items in my library that I never want to see again, either because they don't work on my computer, or because I just don't like them, or because I did like them but I am finished with them.  Hiding them would allow me to find the many games I own but haven't had a chance to try out yet.