I like 'em older. The older the stiffer. Not that I put out that much power anymore but back then you could tell the difference.
Also the older ones, say '86 and before tended to have cable guides and, I use the term loosely, "braze ons" made ofl either machined aluminum or metal that was riveted to the frame. I least I don't have to worry about cable guides that you can't get anymore.
My '84 even has riveted Down Tube lever bosses which I absolutely love compared to the through bolted ones used later.
One of the selling points we used back then was the fact that the frames were the same from model to model (SR's anyway) with the only differences being that components. "You can always purchase this one and start racing and upgrade later on".