I've played with pretty much any film I come across, and in terms of cost-benefit I've settled on Fomapan films. I like the grain structure, they are some of the cheapest BW film available and have great latitude if you like to mess with stand development. I shot this photo on a Pentax ME camera using Fomapan 100. Developed at home with Ilfotec DDX and scanned with a Canon 5D Mk3 + Canon 100mm f2.8.
I've tried quite a few (tend to dev mostly with Pyrocat HD), and still keep coming back to TMY-2 @250. Part of this is b/c its available on 35mm/120/4x5