Dark Theme or an option to get rid of the white background
I have hated the blandness Microsoft introduced with the Metro theme and it such a shame everything is following suit, please can I have the option to tone the Bliss interface down a bit
Nice - there are probably some browser plugins that will do this for you. E.g. https://addons.mozilla.org/en-GB/firefox/addon/site-color-changer/ (for Firefox) https://chrome.google.com/webstore/detail/change-colors/ageghplgcapnfpdhapeemolbmfccclke?hl=en (for Chrome).
Dennis Hamilton commented
This would be especially helpful when evaluating cover art that looks good on a white background but when against a dark background white edges show.
I guess an ability to "skin" the interface could be something... if you know CSS you can probably do something yourself with a browser plugin to override the CSS.