As an agnostic, no meat or dairy. From doing a little research, dairy turned out to be a crueler process shockingly.
As someone who finds a lot of meaning in nature, I don't want to support anything that hurts it with my short life. It was a transition but it turned out to not be very difficult for me. Eating the same but only a few tweaks here and there. It's crazy how it benefits environmental, ethics and heath aspects, I don't even feel like I'm doing anything much different. I see no possible reason to go back. Of course the vegan community, there are some discouraging people and people who pressure others into following a sort of code. I'm kinda unique in how I don't mind consumption of insects, and catch and releasing fish. Most of my opinions aren't permanent though.
I think that a lot of reasoning in whether to eat an animal or not comes from understanding. We understand dogs well, so we'd feel sad to eat them. While many people don't get to meet pigs, and eat them despite their intelligence being higher than a dog's. I think insects would be a great alternative to other animals but that wouldn't become in demand. A lot of my reasoning comes from this idea that, people vote with their dollars. What I give my money to, I'm supporting with my life. Lots of what exists in the world, exists for financial reasons. So if my sister doesn't finish her icecream and wants to throw it away, I'll discreetly eat it for her