There was a semi-interesting question asked at the beginning of the thread - 'Would you like OSI if not for the people in it?'
The answer is no, because no one else can write this kind of music. Nobody writes keyboards like Kevin Moore does. Nobody plays drums quite like Mike Portnoy or Gavin Harrison. I'm not a fan of Fates Warning, but Jim Matheos's work on OSI is like no other band out there. I like these musicians because they speak to me in unique and compelling ways.*
Also, just personally speaking, it took me a long time to get into OSI. I liked the style immediately, but couldn't quite latch onto the material for some time. Even though I like every member of Dream Theater's work in the band, not all the solo stuff works for me. I'm not a huge fan of the Mulmuzzler albums, I've listned to Platypus/Jelly Jam once ever, and I've never understood Sherinian's solo material. Am I biased toward Moore/Petrucci/Portnoy/Myung/Sherinian/Dominici/Rudess/LaBrie because they've been in Dream Theater? Of course, because their unique style is something I want to hear. But good music and bad music don't change no matter who writes it, and I don't waste time with the latter. I have better things to listen to, like OSI and Chroma Key. Because I like being multi-Mooregasmic.
Also, horray for new OSI!!!