I just got my 91 NSX, so my thoughts may change over time.
However, my thoughts echo a lot of the sentiments posted previously here. This has been my dream car since I was a child. Up until I bought it, I planned on daily driving it, commuting to work in it, etc.
But after the work and hunt of getting one, and finally finding an unmolested one with 36k miles on the clock, I am hesitant to drive her around daily due to two main reasons:
1) I'm afraid, that as reliable as this car is, something will fail and leave me stranded in rush hour traffic
2) Careless drivers deem their angry birds round is more important than the safety of others around them, and will total my 36k mile '91 with *plenty* of life left in her. This would make me insanely angry, and sad.