My personal philosophy is that nothing is good in excess. Avoiding soy products is hard since soybean oil seems to be the oil of choice for anything pre-made. So I basically avoid soy in most everything I prepare myself (and try to prepare most things myself).

When I'm cooking/baking, I use butter, olive oil, and (lately) bacon grease, depending on what I'm making.

Coincidentally, in January I had made a list of everything in my fridge and pantry. The only things left with soy were mayonnaise, tortillas, and hamburger buns. I started making the bread products myself for fun. I haven't tried to replace the mayonnaise yet (I really dislike avocado mayo), but it's next.