Hey Owen.... yeah, DS9 rocks! Definitely my favorite ST series. I honestly haven't watched the bonus discs yet for DS9 (just recently picked them up on ebay). Here's the list of what's on them:
Season 1: The Deep Space Nine Scrapbook: A fascinating look at the creation and launch of DS9. Features rare archival cast and crew interviews, and behind-the-scenes footage.
Run time: 14 minutes
Season 2: Quark's Story: A comprehensive look at the character Quark and the origin of Ferengis.
Run time: 11 minutes
Season 3: The USS Defiant: An in-depth look at the 'tough little ship' that debuted in Season 3 and helped change the dynamic of the series and its characters.
Run time: 10 minutes
Season 4: Deep Space Nine Chronicles: Has 2 features ('Bob Blackman's Designs of the Future' and 'Sketchbook: Jim Martin').
Run time: 48 minutes
Season 5: Has 2 features ('Deep Space Nine Sketchbook: John Eaves' and 'Ferengi Culture').
Run time: 17 minutes
Season 6: Has 3 features ('Inside "ONE LITTLE SHIP"', 'Ferengi Rules of Acquisition: The Beginning', and 'Ferengi Rules of Acquisition: The Sequel').
Run time: 17 minutes
Season 7: Has 3 features ('Special: Crew Profile: Ezri Dax', 'Morn Speaks', and 'Sketchbook: John Eaves').
Run time: 24 minutes
I also have all of the following Bonus DVD's (all original copies):
All bonus discs from 7 seasons of ST: TNG from Best Buy
Friday the 13th Best Buy Exclusive: "JASON FOREVER"
Grindhouse: Death Proof exclusive 3rd disc from Best Buy
HEROES exclusive Eighth disc which was a Target Exclusive
Buffy the Vampire Slayer: Exclusive Bonus Disc includes All-New Buffy roundtable discussion, never-before-seen featurettes and more
Total Movie Magazine Issue #1 Exclusive, which features the only DVD of TROOPS
Movie FX Magazine Issues #7 and #8, which features Batman: Dead End and the Making of Batman: Dead End
Dave School's Batman: New Times - this dvd was a promo given away by Dave School and features Minimates (Lego-type) toys that are animated and features the voices of Mark Hamill, Adam West, and more.
I know I have lots more, but this is all I can think of off the top of my head. I'm looking to gain copies of ST: Enterprise Bonus dvd's and Voyager Bonus dvd's. Will gladly swap, or PIF the ones that I have. Just PM me.
Rick