Rectangles are boring
Josef Albers is a little depassé as are perfect squares.
Given a chance, doesn’t it feel and look a lot better being a little bit “irregular”? Especially so, if the frame is conspicously “straight”.
And of course size matters, as does the environment, particularly if the artwork is not meant to sit in a museum space, but is diplayed on a long fence wall, fronting a busy street, where motorists are often blocked in the traffic and represent a perfect captive audience.