You took the words out of my mouth. I, too, couldn't imagine having my 90 without a 6 speed, in fact, any sports car. Of course, when I get a bit older with bad knees, arthritis, etc., I may change my tune.
I went from a 280ZX 5 speed to my 90 6 speed without a problem (my son is driving the Z around Austin,Texas now). I always heard vettes were hard to shift with a very firm clutch, but I did not find that to be the case. Maybe that's more with the older vettes. I actually, find the 90 easier to shift than the Z with a much shorter throw and, of course, a lot more fun to drive! My son agreed, when he drove the 90 last month for the first time. He told me if I ever wanted to swap cars, let him know!