Entertaining or frustrating?
The guy is a machine, I watched his stream (not the whole thing but a few minutes here and there) and he was almost never not typing (or editing something in paint.net).
How he maintains his focus for that long and doesn't get stumped by bugs for any great length of time is truly impressive.
The flip side to this is that his projects tend to accrete bad design decisions and just outright bugs that a more methodical developer wouldn't. Minecraft multiplayer comes to mind.
I'd imagine the pressure of having hundreds of people watching would keep him in check. It's pretty unlikely he'd stream himself doing some casual browsing with a sandwich in hand.
How he maintains his focus for that long and doesn't get stumped by bugs for any great length of time is truly impressive.