Good art? To me, something that elicits a strong reaction, even if that reaction is simply awe at the expertise used to create the piece. It isn’t kitschy, and is as original as a piece of art can be. If not in subject matter, then in execution.
I really like the Italian Renaissance artists, for their attention to realistic detail as well as some of the symbolism, and I like the Italian Baroque artists for their use of dramatic lighting. Caravaggio is one of my favorites, and a prime example of the use of dramatic lighting: