I have.. a lot. I've been needing to list these for my OCD spreadsheets documenting every single beauty item I own, so why not.
Tarte
Some limited edition blush brush
Undercover Lover concealer brush (fantastic for stippling)
A discontinued double-ended angled liner/itty bitty precision shadow brush
Two discontinued foundation brushes (great for powder)
Tiny retractable travel kabuki, came as a GWP. Really good for on-the-go blush/contouring.
Japonesque
Travel small eye detail brush
Travel medium eye detail brush
Travel small angled eyeliner brush
Two of their Go Curl eyelash curlers
Heated mini eyelash curler
Sigma
F80
F45
E16
E17
E25
E45
E55
Urban Decay
Good Karma Multi-Tasker brush
Good Karma Shadow brush
Optical Blurring brush (meh)
Two of the double-ended brushes that come with the Naked palette, the Vice palettes, etc
A fantastic small shadow brush that came with the first Book of Shadows, I think.
Quite a few mini Good Karma Shadow brushes that have come with various palettes
Big Buddha brush (discontinued) A humongous body brush. Great for adding sparkle to whatever exposed skin there is, the whole two-three times a year I do it.
TheBalm
Powder to the People brush (alright, not great)
Eye Will double-ended liner/shadow brush (the liner end is
awful)
Discontinued mini eyeshadow brush
Discontinued mini angle eyeliner brush (both fantastic)
Sephora
Retractable travel kabuki (discontinued, grabbed it on sale)
61 lip brush (old numbering system)
Two different unnumbered concealer brushes (kits)
Pro 25 (old numbering system)
Pro foundation brush, number's worn off
At least four versions of this brush, it's come with a couple of sets and it's absolutely my favorite small angled eyeliner brush, so much so that I've traded for it with other people (sorry for bad pics)
Mini face brush (kit)
Two mini shadow brushes (kit)
Mini crease brushes (kit)
Mini domed shadow brush (kit)
Two mini smudger brushes (kit)
Bare Escentuals
Mini Eye Defining brush
Mini Flawless Face brush
Miscellaneous
Lip Factory brush from a Lip Factory sub box, it's a nice, rounded lip brush that comes to a point
SOHO (drugstore) flat liner brush.
ELF Professional fan brush.
ELF Professional concealer brush
MAC 104 (freebie)
Rock & Republic 203 crease brush
Ulta professional flat eyeliner
Too Faced Teddy Bear Hair powder brush (freebie)
Several mini Obsessive Compulsive Cosmetics lip brushes.
Several Sonia Kashuik shadow brushes
Sonia Kashiuk brow comb/bristle thing
As you can see, I really,
really like eye brushes. I also like to use several different shadow shades and blend them very carefully, and I find using a different brush for each, different blending brushes, etc prevents muddying the colors. Since I use mineral foundation 95% of the time, I can get away with using the same face brushes for about three days, so I like having enough eye brushes to be able to procrastinate washing down to twice a week.