Include more pages into my sitemap?

Well, apart of the forum, I have a subfolder on my server where everyone can create their own characters, and the page provides information about their character.

However, I got more than 20k characters on my DB, so my question is - should I add those pages to the sitemap? (using an addon, which I will write).


Waiting for an answer,
Adam.

If it is a valuable part to your site, that people will likely search for keywords within, it might be a good idea.