I find it funny that these two posts were right next to each other, because the mascara that a lot of people SWEAR by (the Great Lash Mascara), I can't STAND! For me at least, it clumps on my lashes so bad, and it gives me the worst raccoon eyes possible. I even tried the waterproof kind and gave it a second chance, but nope. Still just as bad for me.
The best mascaras I've had were ones I can't afford to get all the time. Chanel had sent me a sample of their "Inimitable" mascara when it first came out, and I loved it so much I used it every day, even if I wasn't gonna go anywhere.

Sadly when I ran out and went to see how much the full version was, and saw it was around $30, I almost cried. Boooooo!
The second one was Opulash from MAC. That one worked so well for me, never wore off, never clumped, all that good stuff. Too bad it's still a bit too much for me at around $16. Not nearly as bad as Chanel, but still pricey. MAC has a "Haute & Naughty Lash" mascara I wanna try, and even though that's in the same price range, has great reviews, so we'll see.
Oh, and you probably have never seen me around here before, but I love makeup like crazy, and one thing I use when I'm in the parks is not necessarily makeup, but it helps save it from the hot FL sun. It's these 24/7 blotting sheets, and they have various kinds. One is rose scented, one is lavender scented, one is unpowdered/unscented, etc etc. If it gets hot to the point that I start sweating, I just pull one of them out and dab it on my face, and POOF, sweat is gone, and makeup is still there. This saved me when I last went in 2010 for Memorial Day weekend. It was pretty brutal.