Iridium Super. Following the demise of the Gillette Platinum, these have taken my number 1 spot. You'd have thought I'd learn my lesson after the Platinum debacle, but nooo stupid me didn't buy 500 or more when I had the chance...
I must say the first few times I took a feather for a run I thought it was the worst blade I'd ever used and would never love it. Since that time long ago my technique has finally allowed me to really get into sync with a good feather and I absolutely love them! Packaged in a 98 or 99r is my favorite shave so far.
For myself: Feathers, Gillette Sharp Edge (Yellows), Super Iridiums, and (with only 3 shaves under my belt with this blade) I think I would add Voskhods to that "short list." I have tried neither the Gillete Blacks nor the Personna Medical Prep blades, and have high hopes for these. As a blade for those who are either just starting out or those who prefer a milder and yet high-quality blade: Red Personnas. Bill