When I started playing, I always wanted one, because a number of my favourite bass players had used them. I could never afford one though, so I had always ended up with something more or less based on one of the Fender models (predominantly either P or J).
I'd had a few opportunities to get one, but always manage to dissuade myself from taking the plunge, either too expensive, too "road worn" or just not the right time.
After some 20-odd years, I finally bit the bullet and got a 4003 (Jetglo, from 2005). It took a while to get used to playing it, the neck felt "different" because of the lack of taper in the depth of the neck compared to the Fender based and Fender inspired necks that I'd been used to. Saying that, it felt completely natural, and it also sounded great. Not your "classic" Ric sound, (it was built before the "Vintage" circuit was standard), but a solid, beefy bass sound non-the-less.
Yes, you do have to play a Ric slightly differently to how you would play a Fender/Fender Inpsired and/or Gibson bass, but it's definitely worth trying out, because it makes the Ric more "competitive".
Anyway, back to the topic:
Love:
Shape (iconic)
Sound
Style (Scratchplate, TRC, triangle inlays, pickup positions, binding, etc.)
Hate:
Bridge adjustment
Neck adjustment
Weight
I know people hate the bridge pickup cover, I removed it from my 4003 simply because it was in the way when I played with a pick. Now I use my fingers and play closer to the neck, the cover is no longer a problem.
For all the naysayers, like I said earlier, you have to approach playing a Ric slightly differently to how you'd approach playing a Fender/G&L/MM/etc. They need to be "played from the hip", kind of as you would play a Thunderbird IMO.