Welcome to the forums.

I rode a bonded aluminum Trek 1000 for almost 20 years. I loved that bike, a bit stiff and harsh, which is common to aluminum. I now ride a 2005 Trek 1200. It is still a bit harsh, but not too bad. No where near as smooth as steel. Have never ridden carbon, so I cannot comment on that aspect. Climbs well and accelarates well. Feels solid and handles nicely. Nothing twitchy or slow about it. Nice balanced ride.

Hope this helps.