I always start with the male, but I prefer a 2" MPT thread instead of your normal starter cuff that goes over the hose barb. The female version is also great for inline filters where a MPT is needed. Not to mention vac boosters as well. I know this is a small market.
patience grasshopper.
there soon will be portables, boosters, and larger intake ports with true 2.0 and true 2.5" in your choice of male or female.
that'll leave you wondering why you ever wanted choke-hole NPT ports.