indeed. We wanted them to be different and reflect rature's experience as a professional artist.
The left guy represents those who can't stick to modern art. He likes it or not at random, and tends to link it with its daily life. He is not the target audience, but his reaction is maybe the most sincere.
For the lady, whatever is shown, she will find something and reflect on her own personal feelings. It might be the mist interresting audience. But which can't really purchase art though.
And the art collector is more interrested in the artist rating : how much value the value might gain, or how much he will be able to show off with that piece of art at home. He probably was the most boring and tedious caracter to code, and probably to read. Which suits him prefectly well. But thats him who purchases art, and generates the gallery's positive or negative feedback.