"Elektro" should be changed to "electronic music". "Progressive" is a term applied to music which is made in an attempt to make music of a particular genre using a more artistic approach (e.g. Progressive rock). That being said, the only "progressive" genre that deserves to be mentioned separately from its base genre should be progressive rock because of the huge divergence in sound between prog rock and the rest of rock music. If progressive rock were a genre in the poll, not only would people that like your average prog rock like Mike Oldfield and King Crimson, but it could also include Krautrock (Can, Neu!), math rock (Slint, This Town Needs Guns), and post rock (Efrim Menuck's bands, Sigur Rós) along with many other sub-genres and derivative genres from progressive.
I also think that black, death, doom, and drone metal should be in their own category, as thrash and metalcore bands like Metallica and Killswitch Engage sound nothing like Burzum, Earth, Electric Wizard, or Mayhem.