recently wrote a very concise article on this very topic, Considering Front Paging a Node?
which I recommend every new Friar should read because it gives a good insight into what sort of things monks consider when they front-page a node.
There are other reasons to front-page other than how well they are written and whether they are impressive - for example, questions that may be asked freqently will be front paged to raise awareness that this question has already been answered, and so that another monk may be able to find it quicker; or a question that has yet to get any response may be front-paged lest it be overlooked completely, as does occasionally happen.
Rozallin J. Thompson
The Webmistress who doesn't hesitate to use strict;