It's a definite Your Mileage May Vary kinda thing, Mr. JJJ -- 'cause, me, I actually like the way Dan Slott writes Octavius. He's a super-genius, yes, but he's also an arrogant, self-inflated, narcissistic, pompous individual who believes himself better than everyone else around him. The man has an ego that rival's Doom's! So, it works for me.
Of course, I'm biased, 'cause I like a little cheese in my comics, and I also tend to write Ock's voice the way Slott does. Including the occasional referring to himself in the third person.
Supervillain rants are fun.