I have an RBX775 and have previously had a BB614. They do make very good instruments, the playability and sound is there, but what I struggle to find in them is a little soul. All of their instruments have codenumbers instead of names, this for me can make them a little sterile in character. Of course there's plenty of other manufacturers doing the same thing, but I think Yamaha could do with giving their instruments some more inspiring names to help with the image.
It's the same with a lot of Japanese sports bikes/cars... GT-R, 370Z, MX-5, YZF, CBR, GSR etc... all soulless.