To add, or not to add?

[tigerlily]

THAT IS THE QUESTION.
Here's a roughdraft I did<3 it's so good.


Here's a finished one. And it's me and Cowboy(Cowboy from Hell) sitting in the tree and we had s-e-x-i-n-g~OKAY enough of that! The question is I can't decide if I should add shading or shading and light.


So here's the thing. I like it the way it was, but I was wondering if it's also good to add shading to it alittle more realistic cartoony way. Or add more detail by adding shading and light to it(somewhat cartoony and anime look) of course though the heart doesn't need shading cause I want mines like the other people who don't shade their hearts. D:

a. No added stuff!
b. Add shade.
c. Include shade and light.