Balance is key, but I also think that there's a lot that needs to be changed about how the gaming community looks at gender, and just how polarized it can be sometimes.
I've always preferred games with just a good story, and I think a lot of other girl gamers I know feel the same way. I LOVED Bioshock because of the atmosphere; I'm a huge fan of apocalyptic narratives and I'm also hopelessly old-fashioned, so exploring Rapture was a pleasure and a delight. I played Myst and Riven as a kid, again to explore and invest in the story. The singing and dancing games are great when you're drunk with friends, but I'm more inclined to go for something adventurous and well-written when playing solo or competitively.
I think the point I'm trying to make is that female gamers don't necessarily need games with "girly" themes, like singing and dancing. It might be more helpful to consider it a matter of modifying the social construct itself, rather than catering to each separate side more. I'd love to see companies make good games and the entire gamer subculture address the casual misogyny that occurs in some gamer circles so that EVERYONE feels welcome to the community, regardless of where they go to pee.