Aesthetics is in the eye of the beholder, and it depends upon the prevailing tastes of the time. A building's functionality, or fitness, is a matter of how well it accommodates the purposes for which it was built. Its structural integrity means soundness - will the building last over time? Historically speaking aesthetics has usually trumped fitness as the overriding factor in architectural design. Classical architecture was preoccupied with articulating features on walls and facades. Modern architecture is equally concerned with aesthetic formalities, such as form following function.
Nowadays architectural soundness has acquired a new meaning, with the advent of sustainable designing. A dwelling sheathed in solar panels has a very different aesthetic than the usual suburban house. Multi-unit housing which eliminates the thermal bridges created by extensive glazing and concrete decks do not share the aesthetic of glass paneled high rise towers. Passive solar designs often borrow elements from local architectural styles to address local climactic conditions.
Know what to ask designers. You need to talk to these people before you choose one to work with and asking the right questions can make all the difference in the world. You need to find out how long they've been in the business of designing home plans, what they have done in the past, and see what they can do for you. Make sure you look at a collection of other houses they have designed; this will give you a solid idea of the quality of their workmanship and creative talent.
With a contemporary open floor plan, you can customise just about every detail of your home if you really desire to do so. Modern home plans are great because they allow you to get the home of your dreams, even if changes have to be made. There are plenty of different ways that you can go about figuring out exactly what your modern home will look like, but a little online research always helps. Explore contemporary styles of modern plans to find the perfect open, spacious home for your needs.