The first and the second are great Dave.
From a personal opinion only, I'm not a fan the tilt shift effect in PP and therefore I'd have to say that te last image doesn't appeal to me.
I think the control of the 'blur' could do with smoothing out a bit if anything as the threshold sets in uncomfortably with overhead power lines. Never the less, it's a fab POV and compostion.
The first one is a belter though, how did you get the vertical lines so straight?! Was it a top lens or was it done in PP?