A fun site to explore is Victorian Station for pictures of 19th century houses and interiors. There are house plans, pictures of interiors, and answers to restoration questions. Even if you aren't restoring or building this site is a good read.
Another site to look at and dream is Dream Home Source. It's loaded with house plans of every description. It can be searched by size, number of bedrooms, etc. Take a look and dream up a home for yourself.
Another interesting site is Yankee Barn Homes. This company has dozens of plans for homes built in a barn style. You can see pictures of houses and interiors. You can even contact them about visiting their houses if you'd like them to build one for you.