Y'all have reminded me of so many things I have hated and loved about various houses. I could second most of it.
I have always like pie-shaped lots, or anything with a small ornamental area but a large useful and private area. I might even want a private patio/courtyard type area in front since I DO want an outside living area and it's best if chickens and goats don't visit!
I love the idea of a country farm table in the kitchen. Not smack in the center though. Close enough to be useful but not right in the way. It should have drawers too.
My last kitchen was not TOO small floor-wise, but had almost NO countertop or cabinet space. There was a hallway just off that had lots of cabinets that I used for most pantry things, but what I ended up doing was buying those low plastic 5-drawer units from Wal-mart and arranging 8 of those against one wall under the window and topping it with a large finished piece of wood (from a huge desk). This served as an off-center island, worktop, and plenty of storage. I MUCH prefer mostly drawers over deep, dark cabinet spaces you have to crawl into to reach the back, though drawers need to be sturdy to hold kitchen items.
I also need low counters or worktops. I am not tall, and kneading bread or any great number of kitchen tasks are tiring at high level.
One thing I LOVE about my house now is the fireplace. It was huge, and painted an ugly color (still is!) but I discovered it FAR outperforms any other fireplace I've ever had for heating. It has vents in the face and sides. I looked it up and it SAID that any fireplace built like mine is a "heatilator" fireplace, which I guess is a brand name. I really don't know anything about it, but whatever makes this thing so wonderfully efficient is much appreciated.
Oh, and as far as the garage door, which sounds pretty cool -- what about sliding glass doors in the same way, which could let in more light and also a nice view of your outdoor area? If I DID have a moveable wall, I'd want to be able to hang pictures, etc. and it not just be a bare wall -- that would look odd to me. I suppose you could attach them someway though?