Do you use forums, forum or community as the directory name to install the forum software in?
Do you prefer to use a sub-domain or a directory for your forum?
Do you prefer to remove the unique forum identifier from the URL?
What is the reason you configured it this way?
My current forum is configured as follows:
http://forum.domain.com and displays the unique forum identifier in the URL.
Initially I used http://www.domain.com/forum but I had some issues with the CMS (running on http://www.domain.com) interfering with the forum.
Now that I've decided to use XenForo for a future project I can't seem to make up my mind on how to set it up exactly.