He's sincere, works hard for what he loves, and exhibits patience even in the face of Battletoads. He's the patron saint of video gaming. That is why he is loved.
I really love GameCenter CX and I really love Arino.
However, the way he treats the female members of staff always make me cringe. Making sexually suggestive comments to AD Takahashi was pretty bad, but it's loathesome whenever AD Watanabe makes an appearance. Whenever she's on camera he's constantly making fun of her weight and calling her ugly.
I was really looking forward to the Densha de Go! episode, but the way Watanabe is treated in that is pretty horrible.