My rear lever is on the NDS, because it needs to be to stay clear of the RD. So I am very used to loosening/tightening with my left hand.

The front lever is then on the DS, so that I can operate that lever with my left hand. Extra convenient in having it on the opposite side from the brake rotor.

The notion of having both levers on one side of the bike to satisfy some sort of aesthetic is to me, ridiculous. Ergonomics > aesthetics.