I made (what I think is) an interesting bass preset. Here's the signal chain...
Input -- Drv -- Amp (then split into 2 lines) --
line 1: Filter (hipass), Cab 1, Chorus, Delay, Plex Delay (delayed octave and Oct+5th), Reverb
line 2: Filter (lowpass), Cab 2, Compressor, Pitch (octave Bass)
all that below 60% and some really cool tones. I set the filters so that I could play chords and have the low notes unaffected (other than compression) while the upper notes went swirling through pitched delays and reverb.