... To think of the characters as people, regardless of their 'furriness', which as I understand it started mostly because Doc had issues with drawing humans. He did not start out to do a 'furry' strip.
So, I see them simply as people, and yes, they are furry, and their personalities do somewhat fit into their animal nature, but that also helps add some plot devices that make the strip more interesting.
And, you have to admit, Doc does do very well with the characters he does draw. As for the 'bubbleheads', they are just that in most cases, non-descript anonymous... well, bubbleheads, that pass thru the stories on an as needed basis. This can be seen easily in the early story lines where they are usually customers asking for typically bubbleheaded nonsense, or players on the field doing stupid things, etc.
I am pleased to see Doc working on his human characters more, as there have been past storylines where they fit better than either furries or bubbleheads, and I am sure there will continue to be times and places in the story arcs that they are better used than either.