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!
In a live situation, this „small combo“ approach surely has its pros. The problem about using orchestral strings and brass sections live is always that, even if the samples are excellent, they still don‘t sound like the real thing due to the PA bottleneck. With a small combo, you have better chances to really create the impression that several musicians are in the room.