I think that it is noteworthy that a players history with one table or another can shape the view of that player. I have been playing now for going on 15 years, and most of those years have been spent on a Diamond.
Now, I'm not contradicting you here, as opinions are just that, but observe the reasons that I prefer Diamonds:
Grew up playing on Diamond
Diamonds seem to be better balanced, and certainly more sturdy than GC's
Asthetically superior...approaching iconic, at least in the tournament room
Lots of these tables out there in tourneys and new pool halls
LOL, very clever

I guess the asthetics come down to whether you lean towards the Washington monument or Rodin.