I always figured longer brine meant more flavor and juiciness, so I went 24 hours on a loin last month and it came out spongy and weird. The texture was soft in a bad way, like it lost all its bite. Now I keep it to 8 to 12 hours max in a basic salt water mix and the meat stays firm but still juicy. That long soak just breaks down the muscle too much, especially on a lean cut like loin with so little fat to protect it. Learned that one the hard way.