Samuel L Jackson looks great, I dont see what you could improve on him. Bruce Willis could be a bit better, the face looks good but there seems to be something wrong with it, maybe because Jackson's face is more black and white and his (plus Travolta's face) is heavily in shades of grey.
Travolta's face on the other hand just makes me wonder what you were thinking about when you made it. Did you just go "Eh... Fuck it"? I cant really complain much about your skills, Samuel Jackson's face looks really good, its just that Travolta only looks worse when standing next to that lol.
Overall it looks good, could just use more work in that face.
PS: Never knew that Tarantino had "Jerome" in his name lol
It went like this. This was my first time using a drawing tablet on my computer, and I'm used to drawing exclusively on paper. Turns out it had a bit of a learning curve. I did Travolta first, then Bruce Willis, then Sam Jackson. That's why they look progressively better, lol. I couldn't do anything to Travolta's face anymore without fucking it up. So I decided to leaving it alone, to my great despair as I knew it looked a lot worse than the rest. Don't worry, I'm honing my skills with the tablet, and will surely upload more stuff like Sam's face.
And yeah, I never knew Tarantino had Jerome in his name, IMDb told me that. I think it looked cooler with Jerome in his name like that for some reason.
Anyway thanks for the review and look forward to more stuff from me!
EDIT : I know why it looks different. The pictures I took as models were in different lighting, Jackson's photo had a LOT more contrast on it.