If your on the discussions here at MD, a big likelihood is you have favorites... What are they, and maybe "Why?"
http://www.ablogtowatch.com (A good general info site for watches
https://www.hodinkee.com (Good website, skewed a bit though towards the ultra hi-end
https://www.rolexforums.com (Best website for Rolex and other lux brands IMO, and a must if you own
http://forums.watchuseek.com/forum.php (Great website for more less expensive mainstream brands
http://www.watchfreeks.com/index.php (another good one for mainstream brands
http://www.watchtime.com (used to subscribe, stay out of loyalty and pretty pics!