Count me as another robusto. But it depends also on what's available, I aim for the most robusto-like if nothing else.
I think that size is a good balance, the rest you can contribute some general rules to. Narrower burns hotter, longer burns longer, etc. So by having a "control" in the middle you can make some assumptions about the rest of the line.
I prefer a robusto when trying a new size as well, but I've been smoking more lanceros lately. Unfortunately, a lot of cigars don't come in this size as it's not a popular one here in the U.S.
This is a hard question to answer. Most of my smoking is done on the Golf Course so I like large ring cigars and long because I do not want to be continually lighting cigars. If I am on the deck in the morning a robusto is the perfect size. If it is in the afternoon and I am having a caesar or Guinness I prefer the larger cigar. I guess I took a whole paragraph to say “it depends”.
Robusto for me. I don't really know why. Its just the size that I tend to buy when I go to the B&M. I like a cigar to last about an hour or a few minutes longer. A robusto seems to smoke in about 75min. for me and thats about right for my current schedule. (tho I have stretched them out much longer)