Yes, peoples needs and desires do vary. I couldn't care less about organ world, ensemble sounds or even SA sounds. In my opinion they do too much for you. I prefer to have more control over the sounds. Not saying they don't sound great, because they do, but properly played, Korg sounds are excellent across the board.
I want my arranger to sound like a small combo most of the time and I seldom do any big band or fully orchestrated songs. Not that I can't; I just don't prefer to play that way.
It's wonderful that we have so many great choices!