I do mostly live PAs solo or with other groovebox artists. The KP3 is my downstream efx processor, the one I put the whole groove through before it goes to the speakers. Depending on the gig, I focus on minimal, techno, house and ambient. For these styles, here's my bank of 8:
Lop.1 - I love the looper cos it allows me to create instant turnarounds. Max depth. I've got the hold button saved to the 3rd column of pixels from the right, and moving a column or two in either direction gives great results...but lately I've been pushing my finger further to the left a lot for quick rhythmic effects.
Flt. 10 - Half depth, no motion sequence. I like tapping this one quickly to emphasize snare hits -- gives them a touch of reverb. Gets obnoxious IMHO if you leave it on for too long, but used sparingly it's quite effective.
Flt. 13 - The radio filter is also nice for quick-hit turnarounds and transitions. I've got the hold button saved at max depth just northeast of center, but as often as not I'll crank it down and bring it in gradually with the level knob.
Mod.3 - My standby for atmospherics, and (from the YouTube vids I've seen) everyone else's as well. I can't argue with success.

I've got a motion sequence playing a figure-8 sweep that avoids the edges of the screen, as that tends to distort the incoming signal.
Dly. 5 - I use it most often 3rd or 4th column from right to add - imagine this! - delay effects. I keep the level knob down pretty low and bring it up as needed.
LFO.1 - Hold button 2nd or 3rd column from left creates a nice one-bar down-up LPF sweep. Level around 2 o'clock -- high but not maxed.
LFO.2 - Same setting as LFO.1 but with HPF. I may have these reversed
LFO.5 - The "infinite" effect is nice. Kinda like the previous two, but I can let it run longer. Good for breakdowns. Also right next to LFO.6, another favorite that I use nearly as often and in similar fashion.