I've absolutely always got a bit of reverb on as a default, and will often add a little bit of chorus too. It adds a bit of 3D, colour, and sparkle if you want to call it that. Echo/delay can of course be mixed in with all this (without going too mad!) it's a case of experiment, having a twiddle with some knobs and see what you think really..
I'd add that I will often use guitar fx rather than "bass" specific pedals, a useful one to me is the very old ME50