I mostly avoid heavily processed foods, prefer fresh food. I'm sure it is somehow good for me. I just couldn't eat only junk, would make me feel sick. But part from that, I haven't seen any emotional changes because I eat rather healthy.

That doesn't mean people shouldn't eat healthy, I think they should. It freaks me out sometimes when people refuse to change their really crappy diet and instead add lots of pills for everything. If we really wanted to be healthy, we should eat healthy.