I've got a banana myself, but if I could have gotten a good deal on a coral glow I would probably have one of them instead. It really doesn't make a difference to me.
I've also got Lessers that were originated by Ralph Davis. I don't think butters or lessers are any different but another monkey wrench thrown into the works is that I know of at least one other line of lesser that was an import and did NOT start with Ralphs original line.
As far as Calico or Sugar, I've seen more nice Sugars then I've seen nice Calicos but I suspect that has more to do with selective breeding rather then the acutal mutation. I'm really not particularily interested in the looks of that mutation but I do like some of the combinations and I'll probably end up picking whichever one strikes my fancy if I should see one at a show.
Another that I plan on adding someday is either a mystic or a phantom. Again I'll probably get whichever one strikes my fancy at the time. I tend to be more concerned with the looks of the individual rather than which line it's from.