That is a really awkward angle! Maybe you could turn the garage into a patio area or sun room. As for the front door maybe one of those with more glass that would make it a little more modern.
So my ceiling angles after you enter the kitchen it starts at 7'6" and goes down to 6'6" I cant find any pictures of any nice kitchens with a similar slant. I would like to put cabinets in but it just doesn't seem possible with this angle. If I get some time this weekend I will take some...