Unreal is set to Base10 by default but you can set it to power of two in editor settings. Which do you prefer the most?
Base10 for sure… didn’t even know power of 2 was an option
1 Snap grid for precise, but if I select multiple objects I can’t use snap grid size 1 and even change values Z,Y,X becuase it display “Multiple”
Well since world scale is metric, thus base 10 by default, that would be base 10 
Use to work in power of 2 as in 8,16,32 ect old school wise but now that Unreal finally has a real world scale every thing is about real world scaling.