I am 100% focused at all the tools when I'm using them. But the most time spent at that 100% level is by far the lathe - but that's mostly because turning projects are longer-duration operations since it's a continuous creation. In flat work, each piece is created thorugh a series of cuts on various tools and there are little breaks in between. With the lathe, you could easily stand in the same position just a whackin' away at the same hunk o' log for half an hour before you know it.
Most focus? all tools
Longest amount of focus? Lathe