Yes, I think the same as you: Yamaha styles sound too much canned, mechanic, for my ears. Korg or Technics styles, for example, have something more richness, deep, lenght...

But Roland keyboards have not the same "easy" and "nice" aspect than Yamaha. Korg kbs are too "pro". And Technics aren't in a lot of stores.. And Yamaha has a lot of converted styles on the net.

So, what's the best buy?