It is not a matter of "need" but a deliberate choice, and reflects my own strategies for engagement in this discussion.
None of this is intended to imply that everyone should use the same approaches. That would be boring. I love some of the avatars being used here.
However, when I came to make my own choice, I deliberately opted to use a photo.
I use the same avatar in other contexts as well; the idea is that it will help associate my contributions in other forums one with another. I'll be returning the the old grainy one here also; but made this change (and the comment on Ned's avatar) in a fit of levity.
Another reason for my choice to use a real picture is that the evolution/creationism discussion is often contentious; and my own personal aims are to keep it generally friendly and helpful. I think a real picture helps remind us of the real person writing the words.
I've deliberately chosen to use a pseudonym to keep my internet persona just a bit distinct from my off-line persona. I'm Sylas. But using a photo helps me come across as still being a full person.
In the end it is probably not particularly significant. But it is my deliberate choice and strategy for my own personal style of engagement.
Cheers -- Sylas
[This message has been edited by Sylas, 03-01-2004]