Cheetah Head Studies

After completing the Pokecember challenge I really wanted to get into drawing big cats again, and after rewatching a very interesting series of videos on YouTube I just had to draw some cheetahs. (Here's the link for those who are interested, I highly recommend watching it)

So yeah, a head study to begin with! The first two on the top were heavily referenced, while the ones on the bottom are more or less drawn while trying to "cheat" as little as possible. 
I also put in a nicer background instead of boring old gray, so yay, I guess.

Constructive criticism is welcome!


Just a small heads up, I'll be on vacation for a week starting tomorrow, so I won't be able to draw, and replies might be delayed.