My Sea Dweller on bracelet and NATO strap. I think this is the best looking casual watch around. Classic look with more weight and without the in your face cyclops.
I regret selling the Pepsi GMT (trying to sneak in the 2nd picture).
As far as I remember all the AP royal oaks now produced are 39mm. The older 36mm were all JLC based movements and now are discontinued. Although the new dual time still looks to be JLC based.
I really like some of the 36mm models, especially the week-month-moon model. They're excellent buys in the second hand market.