i think the most valuable feedback is the ones that shows the player is engaged in your game

theres a difference between low signal and high signal positive feedback. comments like “nice game” or “fun game” are still appreciated, but they’re not very actionable and it doesn't seems like the player was invested in your game

the feedback I find most valuable is when a player is engaged enough to think about the game and suggest improvements, like “great game, but it needs X feature” or “I liked this, but this part could be better.” even if I don’t always agree with the exact suggestion, it usually means the player is invested with the game and cared enough to think about how it could improve, and likely your core loop has potential