I no longer use any form of effects on my basses. I prefer clean sounds. I love the sounds of a bass chorus and I hear so much of it with fretless basses to give that full enhanced echo-ee sounds which helps hitting harmonics almost sound everlasting. Fusion Jazz, loves a chorus bass. It's nice, I must admit. I remember a Disco band, Heat-Wave push a hit recording called: Groove-Line used a very strong chorus bass sound, which I believed really made that song really pop.
Chorus sounding basses, makes more sense for fingering styles and not so good for funk riffs in thumbing and popping. Just my opinion...