I think you could get pretty far with avoiding pain and avoiding boredom. The avoiding boredom can be seen in humans studies like https://www.science.org/doi/1

I think you could get pretty far with avoiding pain and avoiding boredom. The avoiding boredom can be seen in humans studies like https://www.science.org/doi/10.1126/science.1250830 https://www.science.org/doi/10.1126/science.1250830