My primary gear is Digital, just because that's what people expect.
But when I do bring a film camera along I use the following.
Portrait Work - Pentax 645 with the standard SMC Pentax-A 645 75mm 1:2.8 (I will be investing in a 150mm this year). Then usually Portra 400 or 160NC depending on the lighting. Then a Nikon F4 with a 50mm and 105mm lenses and various films, indoor Ilford Delta 3200 or TMZ. Or Portra 400 for better lighting.