I'm not sure I understand what you are looking for.

This forum is now over 12 years old. (That's ancient for a forum)

We have over 17,000 members who have made well over a million posts that cover just about anything to do with kilts. (And some posts about a lot of other stuff)

What do you mean by 'most inportant/useful'? Can you give me a hint and I can probably find it for you.