Maybe you don’t pay attention to this that much, but just for your information, the commercial buildings that you go to every day actually were well designed. Maybe you think that they are boring, not interesting, and all; but actually if you see it deeper, you will understand why they are decorated like that. The first one is because it is a building which is aimed for commercial purpose so the design should be also kind of formal or semi formal. It will be different if you have home office since it is your own home and you can do whatever you want to it.
But of course the designers have thought about everything when applying those designs which you think “boring”. The main point of commercial building is that it is flexible (the style) so that whatever style will be applied in the future, we won’t find any hassle anymore. The second thing is that commercial buildings are different from homes since it is the place for working while homes are the place for living, so this means that commercial buildings should not be decorated too much since it is the place for everyone.
But of course not all commercial buildings are designed that way. For example if your go to Google’s head quarter, you will find such playful, homey, and not-office-like building/ interior decoration. Or if you go to Facebook’s building then you will also find the semi-casual style of building which make their employee feel at home so that they are able to do better working performance. But actually, in my opinion, we should start to change the old mindset about how commercial buildings should be decorated and tend to agree with what Google and Facebook did. A playful and homey decoration will be better especially in making the employee feel at home and result in better working performance.