Anyway, once those noise canceling devils are on, your situational awareness becomes zero.
That's my biggest problem with the iPod/cell phone generation. Those things severely hamper situational awareness.
Now, as far as headphones, there's not much need for noise cancellation if you're at home. Good open-backed headphones (also known as supra-aural) are a better bet. They're more comfortable, they present a wider soundstage, and they have better presentation of dynamic range in the mids and highs. Unless you're really cranking the volume, they won't bleed enough sound to be noticeable.
If we're talking about those Bose things, well, there are much
better headphones out there at the price.