If there exists a god that created or became this universe, then the only evidence we'd have in regards to the personality and powers of this god is the universe itself.
The universe is extremely huge, following a strict set of physical laws, and without benevolence or malevolence. Diseases spread, flowers blossom, asteroids strike planets and cause mass extinctions, snakes hunt prey, love makes people happy, etc. It's an arbitrary set of desirable and undesirable actions. Nature is a constant force of change, sometimes violent, while sometimes renewing. In the universe, individual things matter little, but instead only matter in regards to how they make up the whole.
From this, I suppose that if a god existed, it would likely be vast and neutral. It would have no reason to create a hell, as that's a sadistic and irrational concept. It may or may not care for the happiness of creatures in the universe (as that could have been the intent of creating the universe, or merely a side effect). It may or may not even know that humans exist, let alone have any personal feelings towards individuals.
If god had a direct hand in creating humanity, then I would consider it to not be that skillful or powerful or benevolent, as biology is pretty messed up, nature is harsh, and the predator-prey system is sadistic. On the other hand, if a god merely set the universe in motion, or became the universe, and let it develop as it may, then it may be skillful and powerful, but aloof and not particularly involved or caring.
I once believed in a personal and benevolent deity but in hindsight I think it was just egocentric thinking.