The close and delete tabs of the 10k tools page can get fairly cluttered, even here on MSO; I imagine it's ten times worse on SO. Could the page be modified to indicate which question(s) you've already voted to close or delete?
As one of a small number of users with vote-to-delete privs on some sites, I review the list of posts with delete votes fairly regularly. The problem is that I can't tell, without clicking through and hovering over the delete link, whether a post is one I've already voted on, which is kind of a hassle. Once I've voted there's nothing more I can do, so I'd like to know I can skip past those in the list.
This problem is exacerbated by two other factors: (1) for answers, the name of the answerer doesn't appear, just the title of the question (tonight I had multiple answers on the same question in that list), and (2) if I just click instead of spawning a new tab, then when I return to the list it's collapsed down to three again even if I had previously expanded it.
I don't think we want to remove posts from the list after voting (you still want a handle to the pending ones), but adding "(voted)" or some such after the post title would really help. I've seen suggestions to change the link color; that might work, but let's not overload link color (which should mean visited/not visited), and anyway beware of accessibility concerns. A text or graphical marker will work better for more users.
Alternatively, the lists could be subdivided into posts you've voted on and ones you haven't. That seems like a more-major UI change, though.
I recognize that any solution to this problem will involve generating a different page for each user, while (probably) the current page is generated once for the site. I don't know how much of a consideration that is.