Every enclosed space possesses a specific sonic signature determined by its size, ratio of dimensions and reflective qualities. The reflectivity coefficient, in particular, is important as it is the characteristic most likely to affect tonality. Yes, basic sonic characters will be revealed, but high-end audio always has been and always will be, concerned with the appreciation of subtle nuance and detail. It is precisely these aspects that are likely to be different, room to room. The last and most important variable is the individual listener.
People hear differently, both physiologically and psychologically.
Many differences of opinion between listeners can be accounted for based upon their personal biases as well as variations in listening ability. It is not only possible, but likely, that two individuals exposed to the same system will have differing opinions about its qualities, or lack thereof. This due to both individual bias and differences in auditory acuity. Consider two listeners, one capable of hearing out to 15kHz, the other with an upper limit of 10kHz. If both listen to a system with characteristic brightness above 13kHZ, it is obvious that one listener will be more sensitive to that condition than the other.