I also take pleasure in the so-called negative power in Grotjahn's work. That is, I love his paintings for what they are not. Unlike much art of the past decade, Grotjahn isn't simply working from a prescribed checklist of academically acceptable, curator-approved 'isms' and twists.
Sentiment: POSITIVE
Great Art is Great because it inspired you greatly. If it didn't, no matter what the critics, the museums and the galleries say, it's not great art for you.