The old saying goes, "steel is real". And the meaning of this is the ride is very natural. You can feel the spring in the frame (a good thing), you can feel the road (more of a true ride), and if taken care of properly will last a life time. Steel is not always heavy. A quality built steel frame of good material is not much heavier or at the same weight as many aluminum frames.
Steel is springy? That's interesting. I thought it was more along the lines of aluminum (very stiff)?