Mountains out of molehills.......
I simply find that SPD shoes almost always remind one they are wearing cycling shoes in an unfavorable way off the bike, and at my leisurely pace I find having foot retention a little less fatiguing at the end of the day.

I'm actually not a fan of cycling specific gear in general, but I rather change footwear than commute wearing steel toe boots. My compromise is SPD MTB/hiking shoes with Shimano M420 pedals which are SPD on one side, and platform on the other.