...you can only choose 4? Well I guess I just can't answer in any kind of accurate fashion that actually shows up in the results then.
Barbarian, Bard, Cleric, Fighter, Sorcerer, Warlock, and Wizard have all showed up at my table in equal amounts, though the others aren't actually that far behind.
Perhaps if I redo the poll in a year I will allow more voting options instead of basing it on the 4 person party that is considered "the standard."