Serie O Maduro is my favorite cigar. With a little age on them they are absolutely fantastic. Complex, rich (I found the wrapper having taste very similar to 601 Oscuro), strong, but never offensive. The more they age the better they become. I have a box from Dec 2007 I am smoking and they are great. Just last week I came across 3 cigars with dark blue bands on them which must be about 5 years old and they are even more complex and smooth.
To each its own but I would suggest to try it again, after a good meal. I have not found a better cigar, yet, and t the prices you can get them on some deal sites they just can’t be beat, IMO.