Overall, I loved it!!! So glad to have the show back!
It's kinda neat because there are a few things where it seems like the Status Quo is being reset (Brock is the Bodyguard again, Gary is completely a Henchman again) yet so many DRASTIC new things are happening (Doc has money, Boys still advancing as people)
I'm also excited Hank's hair is growing out again. I know that seems like a silly thing to be excited about, but I like seeing tangible evidence the characters are advancing and the plot is moving forward, so I hated when Hank seemed to have been "Reset" mid Season 4. Good to know that won't last.
Overall I'm pretty excited for the overall season!
What happened to Sgt Hatred's man-boobs?
They wren't there in Gargantua-2 either.
In O.S.I. Love You we find out he went to the OSI to have them removed, so I think it's safe to say maybe in that episode they scheduled a surgery, and that happened sometime between the The Devil's Grip and Gargantua-2.