Not really, maybe a few here and there, but te do have to consider that there is generally a basic structure to all faces. While everybody is different there are still many similarities in proportions and what not.
They all have the same head structure. The lips not really, nose kinda, eyes not really but they're positioned very similarly. Tips: Change the head structure (make più shorter faces), sposta the eyes farther apart o lower it, and have più variation with noses. I drew some really quick bad faces. It can give te an idea, but these faces aren't the best either.
They appear similar at a quick glance but when te really look at them they are all different and look unique theres actually a significant amount of differences in each one of them. However me being me I am far too lazy to go over each and every difference XD
The general facial structure seems to be relatively the same, but other than that, there are other variations that make them più unique.
Try basing your drawings off of foto from real faces to learn più about proportions and differences in facial features. You'll find that it helps te a lot.
