Man, I LOVE Roto Toms.
I have an entire set of the original Chrome ones. I was lucky enough to find them - BRAND NEW - STILL IN THE BOXES!
Talk about happy!
I played Roto toms back in the early 80's.
If you want to know what they sound like - listen to Van Halen's 1984 CD.
Also, listen to "Vandenberg" by Adrian Vandenberg. His drummer, Jos Zoomer (incredible drummer/btw) used an all roto tom double bass kit back in the early 80's. He and Terry Bozzio were my inspirations to go with Roto Toms back them.
I've been using regular toms for the last 15 years, but 3 years ago I decided to purchase a full set of roto toms, and I switch back and forth, using the 7 rototoms as rack mounted toms, and I still use my 18" and 20" floor toms. One of the things that I DO like about them, is the fact that when I use them - I stand out big time... common audience members remember it.
The drums kind of have an "electronic" sound to them.