I have a couple vintage road bikes now, I've owned several over the last 5-6 years. I'm beginning to become mindful of the differences in handling characteristics between my frames, but I can't really articulate the differences between them. The one I'm riding most now has 73/73, and my other one is 72ST/71HT. I prefer the handling of the 73/73 frame better. It just feels better - balanced? I have the saddle and bars adjusted the same on both bikes, the fit is identical to within 1/8". I had a bike that was 74ST/73HT and I couldn't get the saddle back far enough but otherwise it had a nice ride.

Most of my riding is commuting, around 100-150 miles a week, mostly flat. I don't know if that's relevant, just putting it out there.

Can anybody describe their experience with different geometries? What might I be experiencing that I don't like about the more slack geometry?