Standard hub. I’ve got a steel freehub on my hope wheel, I also use a wide body sprocket. On my commuter I have a standard shimano hub.
The reasons,
There are more option in standard hubs, more people build them, supply them as factory wheels and they are cheaper IME. My commuting wheels were about £75, not easy to fins that with a ss specific hub.
Also my commuter is a bit of a bodge so I like the flexibility in chainline. I’ve never worked out a way to use the inner half of the freehub body so maybe a shorter one would be ok.
Finally, compatability. I can switch my ss wheels for my full suss wheels. If I need. My ss has burlier wheels as I wasn’t bothered about the weight as much. I’d probably consider swapping if I was going to the lakes for a week. Also if I break a wheel I can swap over quickly and have spares. Sam applies if you already have wheels from a geared bike or are unsure how it will work out with ss. Nice to have options.