The tendency to imitate is uniquely primate, and especially pronounced in humans. Infant children instinctively copy facial expressions of those around them, directly in response to what they observe. Even fully grown humans will often unconsciously imitate one another without even realizing it, and a good trick of getting people to like you is to subtly imitate things like posture, tone, and facial expressions while in conversation with them.
Given these facts, it's not surprising that things like fashion, art, and decorations should be imitative, too. This is the root origin of things like trends and vogue- the human impulse to imitate. And there is nothing wrong with that. If people didn't imitate one another, we wouldn't have governments, or even civilization!
But what does that mean for making unique decorating choices? How does one deal with this while trying to create a personalized home in (often) cookie-cutter neighborhoods? One way of expressing oneself is on the facade of one's home: paint color for the house, or just color of window trimming can go a long way to adding some personality to your home. A unique mailbox, even, can help, or cute new roofing. And of course, one can go in for a very stylish, chic garage door. Garage doors with windows may be coming into popularity, but that doesn't mean you can't find a great-looking, very unique style that is particular to your home. Or, investing in a carriage-style garage door that swings open from the middle is an exciting way to make a statement.
Just don't be surprised if you get a nice, dark-green vintage stained custom wood door with an automatic opener, and your next door neighbor gets one a month later! It's in human nature to imitate, so try not to be too mad. Just imbrace your role as a trendsetter.