My very first MAC product was Tanarama lipstick!
I got it in 2003, during my first semester of college. I was familiar with MAC before, and my older sister had used it, but I had never bought anything until then. The reason I actually got it was because I had seen it in a spread in YM magazine (remember that mag?!), and had to have it! I wore it everyday for like 6 months, but when I dyed my hair from blond to brown, it didn't really suit me anymore.
What about you, what was YOUR very first MAC product?