What you are proposing is a fully democratic rating system of each member; a sort of peer-review (literally!). If the self-appraisal is included (and I'm not convinced it is a good idea), then it would need to be weighted in some way (or even a seperate score to compare self image with external?) ...
There needs to be a map of skills for:
posing interesting questions / topics e.g. Kaftan's (<{POST_SNAPBACK}>), with scores for:originality,
topicality,
relevance to the forum,
interest;
[*]answering the question posed
accurately,
concisely,
without deviation e.g. Eldar would score highly on these points (probably why he was nominated and accepted as a mod)
[*]providing extra info
[*]providing interesting info (whether relevant or not; i.e. derailing into an interesting