Strangely enough, it was because I was making some blue l/g for my SO, but here's my first haul at an actual MAC store. The SA was soooo nice, she helped me out so much.
I think my first-ever purchase was Tilt (?) nail polish way back when. First makeup was Nico lipglass and the brow pencil... maybe Stud? Something medium brown that I later moved one shade darker from.