I don't like turkey, Christmas pudding or stuffing with meat in it. I like everything else on the list. We nearly always have chicken (as did my parents) and I make up a packet of veggie stuffing with some extra ingredients, like port and/or redcurrant jelly.
I don't really see the point of the whole concept of Christmas if you're not religious, and would happily not do it at all if I was on my own. I would dearly love to spend Christmas Day entirely alone at least once in my life, probably out in nature somewhere. I quite enjoy the run-up to Christmas, the lights and smells and food and music, but I'm usually bored with it by the day itself and would happily take down my decorations on Boxing Day, if other members of my family didn't like them so much.
I much prefer presents to be inexpensive, preferably second-hand or home-made, and thoughtfully chosen to suit the person rather than just large amounts of money spent on something valuable but impersonal.
I think Christmas cards are a complete waste of money and would only send them to people I had no other means of contacting if I had my way. Yesterday I got one from someone high up in the organisation I work for. I assume everybody else did too. There are hundreds of us altogether and he'll be wishing us all Happy Christmas in an e-mail anyway.
I don't get why so many people feel obliged to get together with their extended family, especially if some or all of them find it stressful. I've been married for over 30 years and in that time we've spent one Christmas Day with my parents, one with my in-laws, and once my MIL came to us because FIL was working away. The rest of the time, we've all respected each other's preference to do things in our own way, and nobody has been stuck with an enormous meal to cook. (Oh, and one year some friends of ours decided to invite about 14 of us to lunch, but that was their choice, no pressure, and they had 4 people working on the food in different locations.)