There are virtually infinite ways to mix a song. 

And there are virtually infinite ways to write a song. 

Taking this into consideration makes it obvious that there are also virtually infinite preferences when it comes to both mixing and music making.

I'm sure you've experienced this yourself. 

You show a mix to a client or friend who's super excited about the way it sounds. Then you show it to somebody else, and they can't really hear what's so great about it.

Mixing is complex, and with all the different possibilities, it's almost impossible to make a mix that will please everyone. But don't let that bring you down!