Watch purchases should be made with the heart for sure. Bias is always a great sign of actions from the heart. It's like the girl you have a crush on, may not be the hottest babe around but they just attract you to no end.
I also liked that you did the comparison after a somewhat stint with the explorer. Sometimes people tend to dislike some pieces but never even tried to give a try.
That said, it's fantastic that you like the pam despite the lost of appeal. It was not hard to find a fan when it was the hot brand to collect, but now with the change of tide, those who remains could really be the true fans. Anyway, despite everything, I think the base PAMs of old with unitas are still absolutely fantastic pieces. They don't pretend to be more than what they are, and that's great, and that's what I love about PAMs too.