35mm TriX in Fotospeed FD30 1 to 9 for 6 mins at 20c gives me crisp sharp grain and, a big bonus for me, a relatively short development time.

35mm Delta 3200 rated from 1000 ISO to 25000 ISO in Rodinal 1 to 25 from 9mins to 15 mins produces lots of sharp grain that I love but the downer is long development times when rated at 25000 ISO.

120 and 4 x 5 FP4 in ID11 9 mins 1 to 1 for my fine grain work.