I really like Opulash too, for the natural look it gives me, plus it stays put and yet is really easy to remove....doesn't even need eye makeup remover, just my standard cream cleanser. The colored Opulashes from Wonder Woman are some of my all-time favorites, since they're not clumpy and they show up with very strong color on my dark lashes without having to slather it on.
I'm also a fan of Haute 'n Naughty Lash for the dual brush and when I want a more fake look, but it's harder to remove than Opulash.