I said vacations. I drive a car to work and sit at a computer all day, so no need to take it to work. I have an iPhone for everything else. At home and on vacations, it is my most used device. I mainly use it for reading magazines and surfing the web when I am on vacations.
i choes "stays at home", because it's true for about 80% of my usage with the ipad. i use it a lot at home (movies, youtube, reading and so forth) but sometimes i use it to read while in lectures (but that's just 20% of my usage)
My iPad stays at home. Too cumbersome to walk around with id buy a mini if i absolutely had to travel with a tablet. I just use my iPhone when I'm out.
If I can carry and lift dumbbells around the gym everyday that weight so much more, I don't see why I cannot carry the iPad around with me wherever I go, where appropriate of course.
I use it pretty much everywhere.
At home, at the office, coffee bars, the local bakery, on travels, ...
I would love to bring it with me more, but due to sheer size it often is left back home. Hope an iPad mini with Retina Display is released soon, as I seriously need one.