I dont think people should do it, it creates a false image for others. Like I don't hate it, but sometime they take it to extremes and people think that how they have to look like and usually only bad things come out of that. If it's something simple like clearing up the skin or changing the hues a bit, I understand that, but they change your whole face and body so that you don't even look like the same person.
My favorite element of art is color, I love seeing tons of color and the different ways people color. My favorite principle of art is emphasis, it can show a lot of emotion and can give off a unique vibe depending on how they use it.
This is one the works by one of my favorite artists Yamio! I have been a fan of her for quite a while. I love how she lined the chibi in this drawing and the coloring is really smooth and pretty.
This is her drawing titled "Calm Time".
Link to her DeviantArt: http://yamio.deviantart.com/