Perhaps it's a quirk in your 416 that sits perfectly with your voice. Is it an anomaly in your room that adds that special something to your voice, or is it where you position the mic that just has you humming?

A signature sound isn't essential, but most engineers have one (achieved through compression and eq admittedly). There's no reason your home studio can't have one too. "As long as it sounds good, it is good" as the saying goes...