L`Oreal H.I.P. mascara is pretty good, but my all time favorite is Revlon 3D Extreme Mascara. Because of the tiny brush you can really dispose a lot of product right into the base of your lashes, which is where most of the volume should go anyway. If all the volume goes into the length of the last, they just become straight and don´t curl.
I know lots of people like DiorShow, I used both the original kind and the DiorShow Blackout one, and wasn´t overly impressed