Getting used to either US or EN International keyboard layout
US Standard.

For one, Apple only offer the option of US Standard in some territories now. US International exists for its close resemblance to UK version. Secondly, US Standard is the pervalant QWERTY across countries regardless of the manufacturer. Plus, symmetry. I guess if you need to re-learn where all the symbol keys are anyways, why not use the keyboard that doesn't have a symbol key left of "Z"? It's just better.

If you want you can install Karabiner, and remap "\" into "return" key, and map option+"\" back to "\". This way no worries about that annoyance.