Since we know the Maelstrom, Voodoo Boys, Brainiacs
*, Tyger's Claw, and Valentinos are going to be in the game (and, of course, I'm interested in seeing them in an active role on main and/or side quests), I'll go with
6,
7 and
10.
I dig the way CDPR evolved the Maelstrom and the Voodoo Boys, so I'm thrilled to see what they'd do with the Bozos and the Inquisitors, assuming those'll be in the game in any way, shape or form. I'm especially interested in seeing a 2077 incarnation of the Bozos, I'd be a waste not to have gangs as peculiar as this one in the game.
And I want to see what other type of gangs they'd come up with as well, apart from the already-seen Animals and Scavengers.
Now that you mention them, I have the belief that the woman with the dettachable mouth that appeared in the 2018 trailer might be a part of that gang, because it looks like she's trying to impersonate Lizzy Wizzy.
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* I'm assuming the three heavily-chromed and heavily-armed dudes riding the Combat Cab in the 2018 trailer are Brainiacs.