He is shown to be greatly gluttunous with a love for virtually any types of food. Frequently, he is famished and, when presented with food, would eat quickly without regard as to how he appears to others.
His intense gluttony is a source of weakness as the White Guardians eventually utilizes it to trap him, but his power proves to be great enough to overcome this weakness. Curiously, despite his love of food to the point it could be a weakness, he has also been shown to be extremely picky. At one point, he is introduced to several high quality restaurants but he ultimately ends up being disappointed with all of them.
If not for his love of food, it is entirely possible Forgino would not care one way or another about the trials. He has been shown to be largely uncaring of the fate of humans. Most of the trials he had set out were largely trials he did on a whim without real regards as to how Shu performs. When the decision had been put to vote whether to destroy humanity or not, he ultimately chose to abstain from any decision.