At work, even if I am extremely busy, my level of boredom is between 9 and 10.
At home, usually about a 3, but that goes to 1 or 2 when I pick up one of the thousand books and / or CDs I have laying around and commence filling my mind (or gut, whatever).
Right now I'm at my parents house and don't feel like watching Seinfeld so I'm bogarting their computer, and am currently about a 6.
1 to 10 ranking rocks, there is no more perfect system for anything. Even on a 5-star scale it equates to a 10 point field because of the 1/2 points.
I'm rambling, perhaps I'm at a 7 right now. 7 is an interesting number with lots of history and yadda yadda yadda....