Whats the best site for Dungeons and Dragons 3.5 premade Campaigns?
Each campaign setting has it's own positives and negatives. I really don't like Forgotten Realms (it's saturated in high-powered NPCs in my opinion) but it's certainly the most popular - and the campaign setting is well-detailed. I never did much with Eberron, it's too high fantasy for my tastes and I found the new race options particularly boring. Dark Sun was
awesome in AD&D, I don't know how well it was translated into 3.5. Greyhawk is quite good, and many of the AD&D resources work well with it (The Scarlet Brotherhood remains one of my favorite RPG supplements to date, and it is lore-focused rather than rules-focused so it would be easy to convert).