This isn’t a bad model by any means. If you fix a few spots (mainly moving the poles), you can have a really good, relatively low-poly face. Remember, poles are NOT bad. They are simply tools to guide the direction of your edgeloops. I’ve never seen a face model with no edgeloops that really had the structure of human face. Duoas is right, if you really want to understand poles and edgeloops use the poles and loops post above.
Here are a few things though that I noticed:
You have a lot of 5-poles (circled in red). I’ve marked how they cause the edgeloops to flow. Notice in the image below, how the red pole merges three loops, (the one around the eye, the one that circles the mouth and nose, and the vertical ones that flesh out the cheeks).
Don’t despair, there is a way to move poles in an existing mesh. Take a look at the first page of the “Poles and Loops” sticky where toontje shows how to execute this.
If you have questions about what I posted, you can PM me. I’m not the best modeler around, but I have been studying in depth about poles and loops and it has really opened up my eyes about their importance.
Best of luck!