Since I am the "accused" in this case, it is only fair that I provide my opinion. All of the answers above could possibly be considered correct, but I would avoid trying to be too literal. It is probably closer to being a certain look or feel that cannot be easily described.

When a person is said to have character, it usually means they have a known reputation for honesty or integrity. More often than not it comes with age, given time to prove that one has character.

With beads, in my opinion it is more often possible that beads with age and wear show such character, rather than a new bead, though I don't suppose a new bead could be ruled out. A composition can also show character, often when a necklace has been in existence and worn, such as in this case.

For me I think most often a bead that appears to have had meaning to a previous owner or just exudes a visible past life is a good example of character. In my collecting life, I have often bought beads in poor condition or even broken or repaired beads, because of this visible character, in fact this approach is usually a guiding factor in what I consider to be my favorites.

It probably means something different to each of us and in the end not easy to describe, other than we know it when we see it.

Happy collecting,

Jan