I think, it is true the oscillators on the P12 aren't as beefy and in-your face as other VCO and DCO ones, but by layering a saw with a sine osc, or a saw with another saw with a slightly different waveshape (no detuning, use the 2 leftover oscs for that) you can get a lot more booty.
Character section only sounds nice in low values, small amounts, and doesn't do that much for presence. I like to use them tracked to the keyboard or modulated by aftertouch and velocity to give a bit of livelyness, though.
A low HPf with some res and a bit of keytrack is also good. Keeping oscillator levels low, if you're using 4 don't go above 60, will have a much nicer tone.
I was using drive a lot at first, but these days i use smaller amounts, usually modulated with lfo/velocity/envelopes/AT.
But mostly, this is a true poly! the way the voices interact, when using pan spread and slop, stretch tuning etc...is wonderful, the sum is really greater then the parts.
With this amount of polyphony and modulation-colouring, it's a good thing it doesn't overpower the mix too fast.