What is Character? What does it mean to have (good) character?

[Michael Chui]

Here's the most relevant Wikipedia entry I could dig up:
Moral character - Wikipedia, the free encyclopedia

Here's an essay about heroism from the guy who ran the Stanford Prison Experiment:
The Banality of Heroism

Here's a write-up about literature:
Realistic Characterization Requires Realistic Motivation

Some organizations have this idea of character education:
CHARACTER COUNTS!: The Six Pillars of Character
CharacterEd.Net - Character Traits

Here's Theodore Roosevelt's "Man in the Arena" speech:
Theodore Roosevelt Association

And because you won't read that, here's an excerpt:

There is need of a sound body, and even more of a sound mind. But above mind and above body stands character - the sum of those qualities which we mean when we speak of a man's force and courage, of his good faith and sense of honor. I believe in exercise for the body, always provided that we keep in mind that physical development is a means and not an end. I believe, of course, in giving to all the people a good education. But the education must contain much besides book-learning in order to be really good. We must ever remember that no keenness and subtleness of intellect, no polish, no cleverness, in any way make up for the lack of the great solid qualities. Self restraint, self mastery, common sense, the power of accepting individual responsibility and yet of acting in conjunction with others, courage and resolution - these are the qualities which mark a masterful people.

...

Courage, intellect, all the masterful qualities, serve but to make a man more evil if they are merely used for that man's own advancement, with brutal indifference to the rights of others. It speaks ill for the community if the community worships these qualities and treats their possessors as heroes regardless of whether the qualities are used rightly or wrongly. It makes no difference as to the precise way in which this sinister efficiency is shown. It makes no difference whether such a man's force and ability betray themselves in a career of money-maker or politician, soldier or orator, journalist or popular leader. If the man works for evil, then the more successful he is the more he should be despised and condemned by all upright and far-seeing men. To judge a man merely by success is an abhorrent wrong; and if the people at large habitually so judge men, if they grow to condone wickedness because the wicked man triumphs, they show their inability to understand that in the last analysis free institutions rest upon the character of citizenship, and that by such admiration of evil they prove themselves unfit for liberty.

...

The citizen must have high ideals, and yet he must be able to achieve them in practical fashion. No permanent good comes from aspirations so lofty that they have grown fantastic and have become impossible and indeed undesirable to realize. The impractical visionary is far less often the guide and precursor than he is the embittered foe of the real reformer, of the man who, with stumblings and shortcoming, yet does in some shape, in practical fashion, give effect to the hopes and desires of those who strive for better things. Woe to the empty phrase-maker, to the empty idealist, who, instead of making ready the ground for the man of action, turns against him when he appears and hampers him when he does work! Moreover, the preacher of ideals must remember how sorry and contemptible is the figure which he will cut, how great the damage that he will do, if he does not himself, in his own life, strive measurably to realize the ideals that he preaches for others. Let him remember also that the worth of the ideal must be largely determined by the success with which it can in practice be realized. We should abhor the so-called "practical" men whose practicality assumes the shape of that peculiar baseness which finds its expression in disbelief in morality and decency, in disregard of high standards of living and conduct. Such a creature is the worst enemy of the body of politic. But only less desirable as a citizen is his nominal opponent and real ally, the man of fantastic vision who makes the impossible better forever the enemy of the possible good.

So.

After all of this, I wonder. What is your opinion? What is character? What is personality? What does it mean to be a good person? Is it the same as being a good citizen? What is heroism? Is it part of having good character? Is it excessive? What does it mean to be moral, or have moral fiber? Is the perspective of literature useful in countenancing these questions? Does it enhance or detract from clarity? Which of the myriad virtues offered in the above links do you agree with? Which do you disagree with?