This wasn't really meant to be a discussion on Ratio of story to gameplay, more of how you could portray a story integrated with gameplay.
Personally I don't find the Bioshock/System Shock method that integrated, as you almost need to go out of your way to find all the recordings, and it also didn't make sense why every goddamn person in the game made so many frigging recordings.
I suppose the split box setup, utilized in MGS4, where a cutscene type thing occurs in one seperate screen while the gameplay occurs in another is a decent way to do things, but you couldn't use this technique more than once or twice.
I do like the "villain speaks" while you fight method, it's basically flawless and it's engaging and fun. Or the "radio buddy" who speaks to you while the gameplay is going on, though this can sometimes get annoying.
Oddly enough, while the story itself was kinda bleh, Oblivion did a decent job of integrating Story and Gameplay, especially with the whole *spoiler* sacrifice scene in the villains hideout, for example.