Thinking about it. I eat meat/fish but no dairy at the moment. Have been both vegetarian and vegan for various spells for ethical reasons in the past, have never found quite the right balance health wise.
When I go vegetarian I always get compelled by principle to go vegan, then I get really tired after about a year and the cycle starts again. Cottoned on a couple of years ago that it was dairy that was a digestive and skin trigger, so have been dairy free for two years and that is really working for me. Have to avoid pulses for similar reasons, so have been thinking that could have been what vegan tricky for me before.
However, at the moment, I eat 5/6 small meals a day, all bar one are meat free. So I have been thinking that a vegan January could be a good plan, either to see if it works log term, or at the very least could help me cut back on meat consumption more (to e.g. once or twice a week).
Easy enough practically to have both views in the house I think, but might be different if either of you have an objection to the other's way of eating.
DH usually eats the same as me, but he makes himself a small roast (chicken, silverside or lamb/pork shoulder) every few days and for the next few days eats some of it alongside whatever vegan meal we have.
If he fancies a change he makes a pot of chilli/bolognese and intersperses that with the roast (and freezes some in portions too for next time he fancies a change). Or some times he has a prawn/squid stirfry he throws together quickly (makes a veggie stir fry for us both, plates mine, throws in seafood at the end). Or he will add some parma ham to a dish.
We also do things like make big trays of roast potatoes and carrots, or sweet potatoes wedges that will last a few meals and keep them in the fridge so it is easy to pull a meal together quickly, even if two different "mains" have to be cooked.