^^ Am glad you like it i made 2 versions of that i show you later the other one.
Well bro, in my case y prefer lines like that from Hulk vs Predator, because when you finish a paint you can reduce the size of the line to make them look just like there is no line. But is more easy to paint with lines thicker like the one from Kakashi because you paint faster and you dont have to worry for paint out of the line.
I think the lines in Hulk vs Predator are perfect, because there are two types of lines, thinner and thicker so its easier to paint and easy to modify the opacity with ou afecting the color and the final result, i hope i help you mate.
anything else just ask bro