I don't know what you mean by arrogance.
Arrogance seems to me to be what folks think of someone who seems more forceful in their opinions than they are.
They may be more forceful from insecurity-- making up for lack of confidence with feigned overconfidence...
Or they may be more forceful as personal style...
Or they may seem more forceful because they are competent and correct
Or maybe just because they are assholes.
Have a good year, and your friends will think you are arrogant.
But it seems like the word "opinionated"...
Folks calling others opinionated seem oblivious to the irony of stating their opinion.
The only people I would call arrogant are those who deny their own failures and who refuse to entertain the notion that they may be wrong.
GW Bush is the very MODEL of Arrogant.
Rumsfeld is Arrogant
Cheney is Arrogant.
But their friends and families probably do not see them that way.
Most people I meet I would not qualify as arrogant nor opinionated.
They ALL have opinions...regardless of how forcefully they argue them.
They are ALL, at some time or another, loathe to admit error.
People have a spectrum of behaviors that fluctuate and change with the circumstances.
I can seem arrogant when I am discussing something I feel strongly about... but talk about the mechanics of cars- which I know nothing about... and I will stand there like a meek wall flower while others expound.
There was a story about a sociologist conducting a survey and when she asked people what percentage of other people were assholes... she got a surprisingly consistent estimate of 30%...
Until she asked a New York Cabbie... He said 5%.
"So low?' she asked-
"well", said the cabbie- "its never the same 5%."
We are, all of us, insufferable to others from time to time.