Kept it simple as not to confuse people, and i WAS only referring to his outerwear. if you'd like, I CAN give you a much more detailed analysis of his character design, and what it's intended to tell us about him.
And I DO agree with your simple breakdown of the why's there, it DOES make sense. you'll also notice we saw han use blasters less and less across the trilogy
To reiterate, I prefer the brown coat for hoth.
I'd like to read what you have to say on this, because it sounds like you're making things up (I hope I'm wrong).
He instantly tried to shoot Darth Vader in the face (unprovoked - other than the fact that it's Darth Vader). Here's what I recall (just from memory):
ESB:
Blasted the Probe Droid
Used the Falcon's weapons to blast the snowtroopers
Blasted the mynock
Blasted Darth Vader
...i.e. EVERY time he was in control of a laser weapon, he used it.
RotJ:
Attempted to sneak up on the scout (blaster in hand - pulled the trigger as he got punched - empty hand when he landed - proceeded to beat the scout to a pulp with his bare hands)
Ewoks - had no fear of them. Pulled out his blaster, ready to shoot, stopped by Luke
In front of the shield generator - blasted four stormtroopers. Laid cover for Leia so she could blast two more.
Inside the shield generator - no blaster, but threw the remaining charges at the Imperial officer (he fell to his death, I imagine)
So, as I recall, Han used a blaster EVERY time he was able to.
Dying for your analysis.
And I'm a firm believer of blue, baby!