Of course I do!  I'm a cosmetics junkie as well but the more stuff I try the more I keep going back to my old favorites.  For example, I've given up on all drugstore eyeshadow and use only Bare Escentuals eyeshadows now as well as Bare Minerals foundation which gives me very good coverage and evening out of my skin tone, but more importantly doesn't mess with my excessively sensitive skin.  I also use Bare Minerals Bisque which is a great concealer and is much more natural looking than any other product I've tried.  My favorite eyeliner is still Avon's Glimmerstick.  

I recently tried Lash Maxx mascara from Rimmel and absolutely love it so I'm planning to stick to that one.  I have yet to try Lash Blast though so maybe I'll give that one a try.  I'm such a junkie!