After owning cloth interior cars for 4 years, then getting leather in my new Saturn, it is now a must for me.

Ditto. Not specifically because I like the way it looks or feels (and it does look and feel good) but more because it's more practical. It withstands tears better than cloth seats, and is easier to clean than cloth seats, especially when you spill a Biggie drink in the back. It's a must for any tripmobile.