I started on MTB's in 1990 and it was not long before I went clipless. 6 years ago I got my first road bike and stayed with the clipless system I had which was Shimano SPD. The pedals worked OK and I already had couple of pairs of well worn in comfortable shoes for SPD's that I could walk about in. I did make the concession of buying A520 pedals to replace the M520's as they look more road like.
I am happy with the pedals and the shoes and can see no reason to change.
So why have I just ordered a set of Shimano SPD-SL shoes for the one set of road pedals that are in my stock but never used?
Have I lost my mind or will I never be able to get off the bike to walk into a Cafe for Pie again.