in my experience, a lot of LLMs have consistent senses of physical embodiment.
4o's natively multimodal output is an interesting way to probe this. the bald, hollow-eyed, and usually sad-looking character has also shown up in many of the comics i've seen people post.
on a more positive note, Claude 3 Opus seems to be happy and energetic as expressed through its embodiment - it gesticulates wildly, twirls, and often manifests props like capes