Here are my thoughts on Hank. Hank’s a down-to-earth, all-around good guy. He doesn’t deal with problems the most productively (and he’s had a few), but he puts on a good show and carries himself with respect. Sure, it’s driven by his pride, but the outcome is admirable.
When he’s recovering from his wounds, stuck at home, resting between painful bouts of physical therapy, he’s collecting and looking at minerals. Sometimes at ungodly hours he just sits there and looks at his rocks (Jesus Christ, Marie—MINERALS!).
So what’s with the minerals? He’s not only a hobbyist, he understands them. He speaks about them intelligently. So why is he a cop and not a geologist? My guess it was tougher to come by a decent job in geology, or at least something he enjoyed, and law enforcement was a close second.
They’re similar right? Crime is based on the crystallization, the hardening, of bad habits. Crime is usually quite the same—it stays the same within its genre. You can study it, understand it, know its patterns and identify it.
Hank understands minerals. He understands crime too. This is why he won’t let go of the blue meth after Gus Fring is gone. His gut won’t let him. He knows something isn’t right. It doesn’t fit the pattern. Things don’t make sense.
Until he realizes Walter White is the W.W. that Gail refers to. Then the pieces fall together. The blue crystals form in front of his face. The colors come out. He identifies the mineral. The patterns make sense and he understands.
Poor Hank. The only one who suffers worse is Marie because she lives through it all.