Here in limited vis waters I look at the compass more often than the spg..I keep it on the console,can scan gauges when looking at compass and I hate to wear anything on wrist.Things get hung up when digging or reaching for the lobster.Also less chance of losing it if on console,do not have to remember to pack it in bag at end of day,small chance of forgetting the regulator/console.
I keep my compass on my suit (sk-7, left wrist)
I never bought that "you might forget it" argument either. If you're not organized enough to pack your gear (or keep it consistently in the same spot post rinse) you'll eventually forget all kinds of stuff.
I mean you need your mask. Regs. Fins. Suit. etc etc etc. If I provided a list of all the stuff I take and include my save a dive kit, it's going to be a long list