Many people are slightly surprised when I tell them I am vegan: "But you don't push others to stop eating meat or publish pictures of animals suffering on your facebook wall ..." or whatever "typical vegans" do. No, I don't or I rarely do (I post what is worth publishing), because I believe that if you point out something, you give power towards it. I'd rather post about Japan banning whale hunting for example, because it's good news.
Anyways, my best advice for "ideal diet" is to listen to your body. I personally enjoy and benefit from vegan gluten-free diet, so that's the way I eat. I stopped eating other foods, because I didn't feel right after eating it, or I got intolerant or it made me feel heavy or it made me feel sick or caused stomach ache. Right now vegan feels right for me and I don't feel deprived at all.
You can study every diet on the planet and try to stick to certain kind of diet, but you don't feel OK and don't enjoy it or you feel deprived, body needs something else. Choosing the right diet for you is like a yoga practice - listen to your body, do whatever feels good for you, don't push it or force it, don't exaggerate ... The ideal diet is the one that benefits you and environment.
(I'm talking about real foods - processed foods don't count as real foods :)).
So, have you found your ideal diet yet? :)