It would be great to be able to add Notes on the Recipes you enter in MyFitness Pal. Also it would be cool if I could email my Recipes to other members or share them from my profile.

If you're cooking a recipe that friends are sharing they can get the nutritional info of a serving of the recipe from your diary.

You create the recipe, log a serving in your diary. Friends come to your food diary, and.... depending on platform
website - click quick tools > copy to today
apps - click wrench / spanner in the header with the mealname > copy to today.

They'll have the nutritional info of a serving of the recipe without having to enter all the ingredients and quantities manually and not just stuck doing a 'quick add calories" without the macros/ micros.