No, I haven't finished Perfect Dark Zero yet, but any time that title's single player story and dialog irritates me to the point of stoppage, I've been bouncing around to other titles.
Like this little All-Ages gem: Shamu's Deep Sea Adventures.
Why? Because it's an Xbox title compatible with the Xbox 360, supports HDTV 720p (high-def widescreen), and doesn't suck gameplay wise like Finding Nemo.
Good luck finding the Xbox version, though. I've been able to track down the Nintendo Gameboy Advance version pretty regularly, and the Sony PS2 version surfaced once, but I couldn't find the Xbox version until I ordered it from Buy.com. Searching for it on Activision won't get you jack tuna -- you need to go to their Activision Value Publishing sub-brand microsite. And, oddly, I couldn't find anything about the title on developer Fun Labs' website.
I'm only 4 levels in, but not bad so far -- and a high-def killer whale on a big screen projector turns out to be pretty cool ...