Lipglass and Lustreglass. I always have to get all of them from every new collection(except the fushia colored ones) and I usually can't resist any adorable lipgloss sets of any other brands.
I own:
every single MSF (incl. Pleasureflush)
every single paint (incl. HotnSour)
every single shadestick
every single eye kohl and powerpoint
all three cheek stains/gelees
every glitterliner except for For The Boys (I just didn't like it) and I own a heck of a lot of fluidlines (unless I already had a similar shade of Bobbi Brown gel liner) LE shadows, shadow palettes and quads.
I wish I could get my hands on every single frosty/shimmery/metal pigment ever made (I'm missing Brass, Smoked Mauve, Light Bronze and Bronze).
Strangely enough, I also own almost every single shade of the now discontinued lipmixes.
i'm always missing a couple here and there but for the most part i have practically all the shadows (not including the old school ones, just the regular, pro and recently discontinued/le), quads, fluid lines, shade sticks, paints and msfs. Mostly eye stuff...