It is normal for most to be influenced to some level or degree by others opinion....
Another important thing is learning to trust our ears....
Then we must set some acoustic experiments and train ourself then this improve self confidence a lot...
Exactly, perfectly right!
Guttenberg said something interesting about the audio journey, recently. As we age, we change our opinions in part because of our physical hearing, but largely because of our ability to discern.
If a friend made a comment which lead me to question what I was hearing, it would probably because I trust their discernment. That would give me a reason to do what Mahgister suggests -- do experiments. We only have the science and technology of audio because of skepticism, testing, questioning, and corroboration of results.