Good art/Bad art

To me good art consists of a lot of emotions. It's hard to describe my kind of art because i like so many of them. I get fascinated with details, colors and just things that make me wonder. For example, if you have seen Egon Schiele's work (which is an artist we are currently studying about in my beginning drawing class), he puts a lot of his depressing feelings into his work. He has a sick mind and stuff like that interests me in art. As much as i cherish Comic book art, i have a side that also cherishes the real art work of a painter and just an artist themselves.  Good art has to have a feeling into it. A great vibe and something that makes you say, "Oh my god.. this is just pure amazing." (First picture)

Bad art has to be one of those dull paintings. I really don't know what to call them. It's those paintings that have colored squares (second picture). I want to say abstract? But it's those paintings that have shapes and plain colors. I never understood why that's considered art. Even though the artist would say it means something.. i believe there are better ways to show how you feel in a painting than just squares. I look at paintings like that sometimes and i'm just telling myself, "Why would you consider this art..?" I don't mind being lectured on this though. I'd really like to know.