Yes i do.
Always (or almost always)
I leave it on until I'm done with it...
I let mine power down by itself once a month & I turn it off before going to bed
Why bother to turn it off? :-)
I leave my iPad on while charging, however, it shuts down automatically after a few minutes anyhow.
I only charge when it's at 20 % when charged I unplug... The battery last longer when it's not overchared
I turn mine off out of habit and then charge.
But as someone rightly said it switches off anyway.
Greetings from paradise,on my iPad