Sorry for such a long post, but your question was quite general. I tried to structure it in order of relevance to the question and simplicity, so just read till you get bored or find what you were looking for. This is perhaps more a question of philosophy and/or psychology than of science. Although there is certainly some interesting data from neurology when it comes down to it. For the obvious scientific answer, I'd have to say not really. However, this is simply due to the inversion of images in the mirror; if you raise your right hand, it appears as though the person in the mirror is raising their left hand. I don't think that is what you're asking though. From a philosophical perspective, I don't believe it is possible to determine how another individual perceives even things as simple as colour. If there were some process by which a person's memories and, as such, their associations of colour could be implanted into another person's body, then it is easy to imagine that they could discover that what they always associated as being green (e.g grass), is, with their new brain and optical processing system, what they would have previously called red. Just like with colour though, they will have come to associate a certain make-up of features with 'you'. Therefore, if they observe a very similar make-up, such as in a photograph, or well-done drawing, it will trigger their facial-recognition of you. When you say 'even in different mirrors and lightings, I look different', do you really find that surprising? If I look at myself in the mirror when there's a single source of relatively dim light shining from an angle, then the shadows of my muscles are enhanced, making me look well-toned, instead of like the scrawny weakling that I really am. Rock Star Mommy also makes the good point that people are generally a lot more critical of their own appearance than other people are of it. In extreme cases this manifests in conditions such as body dysmorphic disorder (check sources). Now, to continue with psychology (and a bit of neurology), we find where the question gets really interesting. Although there is debate on the topic, lots of people believe that some of the processes we use for face recognition are used exclusively for that purpose and not, for example, in recognising the difference between two similar objects. Thing is, when it comes down to it, although it may not seem it, most faces are pretty similar. There are some things that I think are testament to the fact that human recognition is pretty special. One of these is the 'uncanny valley' effect. You know how some doll look spooky? Well, it's been suggested that this occurs most strongly when the deviations from what real humans look like, or how they move are slight. As such, alarm bells ring to tell you that something is not quite right. There is also a very interesting condition called Prosopagnosia which pretty much prevents people from being able to recognise faces properly. It sometimes occurs after brain damage or stroke. It can even affect the ability to recognise your own face. However, there is usually no problem with recognising objects. There are also various psychological disorders that fall under the umbrella of delusional misidentification syndrome. These are very interesting, and if you take a look at any of my sources, you should look at that one, even if it is somewhat tangential. There is even a syndrome where people think that who they see in the mirror is a different person! It is also interesting to consider why it is so much more difficult to tell the difference between sibling dogs sometimes (even if they aren't from the same litter) than it is with people. Oh, and as a final note concerning a previous answer, the fact that your voice sounds different in recordings is completely unsurprising. This is because of the fact lots of the vibrations affecting your eardrums are travelling through your tissues, as opposed to through the air as they do in recordings. Also, few recordings are of good quality.