I love Mac Gel Liners its so easy to line my eyes with it. I prefer gel liners over pencil because I like to get a good precision in lining my eyes. You can go thin or thick with lining the eyes with it. We all are so used to using black in lining the eyes but there are so many other options.
Here are other options for Mac Gel liners <3 ( Water Resistant and Smudge Proof)
1. Phlox Garden
3. Rich Ground
4. Dip Down
6. Black Ivy