Yeah, I probably came off as a bit more defensive than I needed to be. In fact, I probably came off as sounding a bit more defensive than I actually am. I guess when it comes down to it, it's our house, and I am not asking them to change traditions at their house. The only two requests I've ever made at holiday time were: 1)Last year we have pigs in a blanket (which wasn't any problem) 2) we dish out our own food. The second request was centred around potato issues. My MiL, when cooking any dinner for us, would serve it, and heap everyone's plate with potatoes (she loves her potatoes). I like potatoes to an extent, but my days of making them the centre-piece of my meals ended a while ago. This request caused no end of complaining, including passive aggressively during dinner. Plus she literally threw stuffing on my plate, which spilled off and stained the table-cloth, which she then went on about me messing up after dinner. This wasn't at a special dinner that they invited us to, but Christmas lunch in a home that was supposed to be ours as well (and where we paid the bills).
So, when I found out we were having the main Christmas dinner here, it's sort of frayed my nerves about it.