I've never been able to answer one of these posts. I always start out with something popping into my head, then I look at the list and go, "Oh yeah, but what about THIS one?" and by the time I'm done I'm juggling way more than one favorite. Hell, I doubt I could even nail it down to one favorite for each size!
I like Bolivar and Partagas for really bold flavors.
I love Trinidad and Cohibas for their specific flavor profile (which I find similiar).
I love Monte's for their, what I consider, refined flavor.
I also couldn't ever give up my RyJ Ex. 4s.
Then of course, there's all the others.