Given that JCM is the definitive Hedwig, I liked Michael the best. He wasn't the prettiest Hedwig, but that worked out fine, as he excelled in many ways.
JCM himself stated, when he asked Cerveris to take over the role, that Michael sang the role better than he himself did.
Also, Michael had a way of emoting, even over-emoting, that worked for me.
His ad-libs were the best. My favorite - "Is there a doctor in the house? These people don't seem to have pulses." (on a night with a non responsive audience).
His Wicked Little Town reprise was breathtaking. With his bald head, twisting and gyrating body and heartfelt histrionics, made him appear as an alien from another planet. It truly was a transformation. NO other one came near the effect of that one.
For me, Michael was the most believable Hedwig. He kept the accent throughout, and every emotion was felt pretty intensely.
<-----I'M TOTES ROLLING MY EYES