(Please know that this is very tongue-in-cheek. "We" is just me, and it's actually just a list of *my* favorite products. There's no nomination process, voting, or scoring. Just a simple list of things I like and use myself.)
Maybelline Full N' Soft ($6.50 or so) is definitely my top drugstore mascara. No clumps and it builds full, soft, thick lashes just as promised.
MAKE UP FOR EVER's Smoky Lash
For a higher-end product, I love MAKE UP FOR EVER's Smoky Lash ($22)! Thickening, lengthening, it's one fabulous package. I will say the tube doesn't last very long before it starts feeling sort of clumpy- maybe a little over a month? At any rate, there have been times that it's been worth it to me, that's how much I love this mascara.
Bare Escentuals Buxom Lash
A slightly less expensive higher-end mascara that is also love is Buxom Lash ($18 at Sephora). Absolutely no flakiness, this darkens, lengthens, and thickens just as Sephora promises.