I really like the vocal coaching section of this episode, since it systemizes the stuff I've been doing all along. It's much easier to understand these concepts when they're presented in audio.
But mine's a chat-based game, and we don't use voice at all. Now, you -can- differentiate characters via textual dialog - and as GM, I *have* to - and the underlying principles are kinda the same. Favorite expressions and behaviors, use of vocabulary & slang, and attention to grammar are all factors I use to keep NPC voices distinctive in my mind, and those of the players. Just try not to get carried away with typing out dialects, lest they become impenetrable.
I personally don't think it's weird to gender-bend, being a GM and all, but there certainly seem to be a lot of gamers out there who've had bad experiences with it. I did play with a guy once whose female PC became a Raging Whore, but this was after she'd been reincarnated from an ogress to a Hot Elven Chick, so we considered it appropriate at the time.
One archetype that I didn't hear mentioned is the Woman Fleeing an Arranged Marriage. I've used that one a couple of times - it's emotional, it's motivational, it happens, and it's a hell of a lot better than the Vengeful Victim cliche.
And I did play a Henpecked Adventurer once - it was a gas.