I'll confess: the bitcoin GUI is not a high development priority for me because I think downloading and running software on your computer will soon be almost extinct.
I expect pretty soon most people will be using bitcoin through web applications (like mybitcoin or instawallet) or as apps running on their mobile phones.
I'll also confess that I like the bittorrent model-- create a great technology, a "good enough" interface for it, and encourage the creation of compatible applications that have great user interfaces.