Oooh, I'm going to have to check out some of those sites!
I usually use allrecipes.com, but I wanted to point out that I always read a few reviews, too. Sometimes the reviews have an easy tip that makes the recipe better or easier to understand, so they can be very helpful!
But it always makes me laugh when a reviewer gives a dish 5 stars, then proceeds to list the 12 minor changes they made to the recipe.

"This recipe is PERFECT. I just added these 5 ingredients, changed the cooking method and time, used chicken instead of beef, and covered the whole thing in cheese. DELICIOUS!"