I ALWAYS always always use waterproof mascara. My eyelashes are VERY stick straight, and will curl, but as soon as I put mascara on them, they wil droop back to being straight. With regular mascaras (and I've tried a LOT), they'll look nice and curled and stuff for about 10 minutes, and by the time I'm out the door, are limp and stick straight again.
Waterproof mascaras are the only kind that keep my lashes curled and pretty. I use Maybelline Full N Soft waterproof. When I put it on after I curl my lashes, they stay put. Natural looking, and my curl never quits. It IS a pain in the a$$ to take it off, but to avoid that I just use olive oil. Cheap, doesnt ruin my lashes and is a gentle way to get it off. I use a lash conditioner at night rarely, my lashes are hardly ever dry because of my mascara. The only time my lashes fall out or come out is when I sleep with it on, or try to rub it off with regular cleanser.