Frame Material
 

All four of my bikes are aluminum, Road bike - Raleigh R 700, Commuter - Van dessell Straight UP, ATB-Giant, Recumbent - windcheetah.

What am I missing by not riding steel or carbon? Different ride, responsiveness, handling??

Is it worth adding a steel frame to the group?

Steel rides nice,but are you happy with your current bikes? I wouldn't buy a bike just to get a certain frame material.

You are missing a cross bike. You could get a Jamis Aurora. ;)

Nah, you're not really missing anything. But should you feel a sudden craving for a sweet new ride, I would suggest some fine cromoly. That stuffs my jam.

NO, because if you add a steel bike you will immediately hate all of your aluminum bikes.

Actually I'm ok with aluminum hardtails, i just can't stand aluminum road bikes.

The essence of your question is "should I get another bike?" and we all know the only one correct answer to that, don't we. ;)

YES!