I find moving ads incredibly annoying.  (Ditto for most animated avatars.)  I find it hard to read text when there's something jumping or flashing on the page.  Before Firefox, I would actually re-size the browser window to cut off animated ads. 

With Firefox, I so rarely see ads that they're even more aggravating when I do see them.

But I don't mind the Poser-related ads, if they don't move.  I block them all while I'm work, because I don't want people to think I'm looking at pr0n.  But I've let the JPGs through again at home.  (GIFs and SWFs are still blocked.)