Honestly, I was skeptical about this pairing at first because the power imbalance is so extreme, but I read a few fics and now I'm hooked. It's all about the tension between Poseidon's raw, divine authority and Odysseus's purely human cunning. A lot of stories frame it as a long game of cat and mouse that started with the blinding of Polyphemus, turning Odysseus's 'Nobody' trick into a personal challenge for the god.
What I find interesting is how writers handle consent—or the stark lack of it. It's rarely a romantic meet-cute. More often, it's a battle of wills, with Odysseus using his wits as his only defense against a force of nature. The exploration shifts from physical power to psychological domination, which makes the rare moments of genuine connection, born from mutual respect for the other's 'mind,' feel earned. That's the heart of it for me: the god of the sea versus the man of twists and turns, endlessly trying to outmaneuver each other.
Some fics even flip the script, suggesting Odysseus's very identity as a trickster is a kind of power that unnerves Poseidon, making it a dynamic of fascination as much as wrath. I've seen a few where Poseidon is almost... addicted to the challenge, which creates this weird, toxic symbiosis that's grim but impossible to look away from.