I'm not a fan of maduros, generally, but there are a few exceptions.

The 1926 No. 9 Natural is one of my top 5 smokes of all time. They are expensive, but I keep a few in my humidor for special occasions at all times.

I find the X000 series in Natural merely OK. Good, mind you, but not a top 10 cigar.

I did not really care for a 1964 Natural I tried awhile back, but I've been meaning to try the 1964 in Maduro since everyone really seems to like it that way.