Animal suffering and environmental impact are the primary factors for me but I'm weakly motivated and don't think I'll be able to change my habits without my partner changing her eating habits as well (she prepares most of our meals because she likes cooking and I do not). Animal suffering is not important to her and she's had some health problems on a vegetarian diet before so she's only willing to cut one form of meat and see how that goes before cutting further. I'd like to cut the one that generates the most problems and replace it with vegetable products first and establish a new, better equilibrium first. I do think that I'll be better at planning vegetarian replacements than she was, so I'm optimistic that eventually we'll get to pescitarian at least, but I wanted to get input on how to think about the first step.