IMO, one of the all time best bass sounds is Geddy Lee's live sound on Exit Stage Left. If you can find a copy of this album, you'll hear what I call the "hide the children" bass growl that I haven't found from any other bass. Rics have a distinctive sound, but it's not only one sound. You can play reggae and funk as well as rock with a Ric.
The stereo output does give you tremendous tonal flexibility if you have a stereo rig or two rigs, because you can EQ each pickup separately.
I love mine, but their looks and sound aren't for everyone. As far as neck feel, playability, build quality, etc., they're at least on par with any of your major mid-level basses (Stingray, Fender American Jazz, etc.).