In the car, at work, during lunch, at work, at home, at the hair salon, while shopping, while waiting for anything, i.e. At the DMV, at the movies, in restaurants. Even at the gym.
I voted about the same. Truth is during normal weeks, it's mostly home use. But I travel for business quite a bit and I always take it on those trips. So overall it's 50/50, but on normal weeks it's more like 80/20 home.
On the go for me. I'm on the subway for just over an hour going to uni each day and it is great for reading articles and books before classes and to catch up on the latest news and forum talk. I am not worried about theft here in Stockholm. People are curious and ask me tons of questions about it (strangely enough, they are usually elderly who see it as a way to read given their failing eyesight).
when i'm at school, i use it equally, both for class and at my house, since I only have a wifi 32 gb iPad, and my campus has wifi everywhere, so it's very convenient.
however, when i'm not at school and i'm actually at home in nyc, i mostly use it inside my house.
Great for meetings at work and light work when I don't feel like lugging my MBP-17 around. At home, it's my main source unless I have to do some serious writing or computing.