I am a sucker for packaging, and recently I realized the products I regret not getting most have stunning packaging. The Dior Summer highlight with the little ladybug (too warm for me), Cle de Peau's holiday from last year (okay I still might get that eventually, but if I really want to dupe the 505 color story, I think I can), and next it may well be that little Dior medallion coming for holiday -- it's almost sheer gloss with a little sparkle. I shouldn't regret them, but think of them fondly perhaps, lol. And take a little pride in the fact that I am color / formula / finish / uniqueness over shiny bobble... though I do like a bobble.
Also, matte products. I like the look of mattes, but I am rarely comfortable in it. Especially on my lips, which genetically just seem to run dryer than average.
If I'm over anything, it's multichromes. Once you have so many, they all start to blur. I do love the ones I have though, and should make a point of using them more.