It was kinda funny, this Tadashi guy. As Hiro said, he must really have hated his job! Or really damn dumb!

I suggest both! But anyway, liked his multiple travels back! It was a nice metaphor for his own life lessons!
I guess that's why I like Hiro so much (along with his time travels of course)! There is life lessons surrounding his ''heroic'' attemps! Almost always! You can't say as much of the other characters!
Anyway, since we're on the Hiro topic, let's talk about something: Where/When do you think he went in the end? The way he said ''fine'' at the end, after his headache... He, like, smiled, right? Did he had some kind of vision? You know, like the one he had of the Carnival, that could be a solution to his problem? That's my theory but, even if my theory is wrong, surely he went somewhere and/or somewhen!