Most fans don't give a crap about linemen. They want sexy picks -- WRs, RBs, QBs, even CBs. Thus, getting a DT that probably none of them have ever heard of isn't popular.
Didn't the Titans win some crazy-ass game against Jacksonville in which Vince Young only got on the field twice in the second half because the Jags gave up like 4 turnovers for TD?