Most "oops" moments in a kitchen come from the fridge. Enter your cabinet opening and I'll tell you what actually fits: proud vs. flush, whether the doors will bind, and how much it'll stick out. Then I'll show you the models sized for your exact space.
Top-down view of a 36″ opening in a cabinet run. Pick a refrigerator type and a cabinet depth and watch where the face actually lands. This one drawing is the most expensive surprise in kitchens.