Didn't bothered with Ginga and S, watched a few episodes and that's it.
Really liked X, I will rewatch it
Orb is really great, Gai is probably my favorite host, that dude is cool and knows his shit.
And Geed is a step down, Riku is a huge noob, don't really cared for him. But at least Zero is a main character too and probably the best part. Geed worth at least a shot.
Enjoying R/B so far