The nicest mascara i have at the minute would have to be ysl false lash effect mascara
I call it my nicest because everything about it is amazing - it thickens, lengthens and defines amazingly, and is such an intense black it provides a really dramatic look

The best thing about this mascara id have to say though is its to die for smell - that horrible acidic smell you often get with mascaras is reinvented as one that seems infused with perfume! I think the price is worth that alone, it makes such a difference and the signature luxe gold packaging is a welcome addition to any make up bag :)