My favorite liquid eye liner is the Nyx Epic Wear. I use the shade Stone Fox which is a dark grey color. They were out of black when I purchased it which turned out fine because I love the stone fox color.
This liquid liner is super easy to use. It STAYS ON! Literally, it’s really hard to wash off. You have to use eye makeup remover to get it off. Once it’s dry, it does not budge. I have worked out with it on and even went swimming with it on and it stayed put.
It’s NYX so the price is decent as well. It’s very affordable and great quality. I don’t think I’ll ever use another liquid liner.