probarly a subforum in the 'Ratchet's Repair Bay, ID Help & Transformation Help' forum

They can be personalise (subjective) guides rather than absolute authoritative guides, e.g guide to the best third-party add-ons for your classicverse toys, or guides with better references and analysis e.g guide to buying the best tv show accurate characters

Guides can include HD's
Heroic's Toy Shop Guide Maps for HK, Osaka, Tokyo & SG
http://www.otca.com.au/boards/showthread.php?t=11556

I dont think people will have time ,hyperlinking to other guides on the net and creating a thread for discussion can be helpful