I like Foma 400. It has beautiful grain.

I find it half the speed of HP5+; also, that it has less of a tolerance for underexposure. At 1/2 second you need to start adding exposure to account for reciprocity, and the amount of extra exposure you need increases much faster than for HP5+. Still, it is a pretty film, and I like it.

My favorite of all is HP5+, but I still like Foma 400.