I just put whatever it takes to make remember that particular cigar. I may put the price, length and ring gauge, and what I thought of it. I have put the filler and the wrapper country, but that info can be looked up if I want to find out.
I may also put what I was doing or where I was when I smoked it. I seldom put the date.
The bottom line is I want to remember the cigar, and anyone who reads it may think they'd like the cigar or not like it by what they read.