I adore makeup and my close friends know that I call Sephora the "Mother Ship." I love to experiment with new products, but as many as I have tried, including several expensive brands, I always go back to one mascara:
Loreal Voluminous.
I get the original formula in blackest black (about $7). I find that it thickens and lengthens my lashes, stays put all day, and comes off easily--when I want it too--with soap and water.
I have a couple of mascara tricks too.
--First off, I put the brush at the base of my upper lash and then spin the brush in place several times. This creates a dramatic lash line.
--Then as I am coating the rest of the lash to the ends, I go slow, and do just the slightest side to side motion with the brush.
--Then, I coat the top of the lash.
--Last step...I use Sonia Kashuk's Lash Comb (available at Target for $5):
This comb is the best one ever, because the comb side is made of metal and not plastic. It truly separates and de-clumps the lash.
(side note: Proudest moment ever...I was at Sephora in Frisco and I actually taught my technique to the sales person who was a male, who was wearing mascara, which was kind of weird.)