Maybe this is oversimplifying things but the best diet is one in which you eat less calories than you expend during a day and then you lose weight. Doesn't matter if it is from carbs or protein or fats.
After the first month i went to a dietician and she turned me onto this fitday site to log food and check for daily nutritional requirements. I still didn't use fitday for a few months and just went on a wing and a prayer!! But after i started logging food i changed mine and my wifes diet accordingly to get the daily nutrition needed of everything listed.
However one achieves this is their own journey. And if your food log does show you are low on some things, then you should change your diet until it is good while maintaining a good calorie deficit to lose weight.
Started weightloss Nov 24 2009 302lbs
Started Fitday: February 19 2010 263lbs
Currently weigh in at 220 lbs
Jan 1 2012 goal 202 lbs