If I was gigging (of course I don't and no intend to
) at home I would try to make all styles,voices,regs to sound quite similar by using as much as possible flat equalizer.
Yes they wouldn't sound alive at the moment but when I will "trigger" better EQ settings at least I will know that if a frequency exaggerates it would be to all styles/voices etc.
The closer and flatter the frequencies are the hardiest is for a sound to exagurate so much.
Of course this is just for when tweaking the styles,voices,midis to save them.
After doing this also you can then adjust the Eq settings for the sounds to be also alive in your home.
I have the preset styles on my keyboard that don't sound so alive at flat settings.
The styles of the euro dance pack are having more effects and sound more alive with flat settings.
(You can see at style panel +30 brightness +20 at high frequencies etc).
So when I am trying to make the preset styles more alive with better EQ settings at high and low frequencies,
the euro dance styles will have parts that are sound too high and exagerate because they already have high and low frequencies that are at a high level by default.
I don't know if you can understand my "greek" but all i am trying to say is that different styles/voices/midis have their own different default EQ settings and that is what is causing the problem in my opinion except from the fact that styles etc are by default at different volumes.
Psr3000 probably didn't have so advanced mixer,EQ settings etc so the problem with sounds trying to be "the star of the night" wasn't that obvious.