Hi Loving---We use both at our house. I prefer almond milk, especially with cereals, and my daughter prefers soy. We also use rice and coconut milks, but I usually use almond as it has fewer carbs.
Soy is perfectly fine and actually is quite beneficial, even for women with breast cancer. The estrogens in soy are the same as the weakest one (our bodies make 3 different kinds of estrogen) and actually fill the breast estrogen receptors so that the stronger, disease creating estrogens cannot.
I do agree that soy should be organic as it tends to be a heavy GMO (genetically modified) food. I tend to use almond milk in smoothies because I use a soy/tofu powder/rice powder drink mix.
Flax and chickpeas contain phytoestrogens and you don't hear anyone warning people from consuming them. But, read this article. It shares references that may help your decision. http://www.womentowomen.com/healthynutrition/soycontrover....
Give me a call if you have any questions. You have my number. Be well, D.