I have had several outstanding cigars, though i don't know if i could pick one out of the list and dub it the "Best Cigar - Ever!" but on this list, I would have:
A Cohiba Robusto a friend brought back from Italy 2 years ago.
Cabaiguan at my first major cigar event, turned out to be my first box purchase and the inspiration for my tag here.
A Padron 1926 80th, Natural. Just amazing.
A Padron 1964 with 6 years of age on it. It was my first 1964 and was so smooth and tasty.