I don't gig.
I only plug a tuner into my rig. I don't want anything between my bass and amp as I haven't become fully aquainted with what I can already do with what I've got. One drawback to my situation is that it is rare for me to play at gigable volumes so my view is hardly representative. I do however echo the sentiment above that fx complicate things and make troubleshooting more of a chore if things aren't quite right.
If I ever got to gig regularly I might change but I think it is unlikely. My Ashdown has Five band eq, Compression, Deep, Bright, Overdrive and Subharmonics already without plugging anything into the FX loop. I'm happy enough with what I've got.