Eyeliner or not that is my question

Yes girly!

Yes, always yes! You can always do it in different ways such as only waterline, doing a cat-eye or reverse cat-eye, graphic, etc.!

Both

Absolute

depends on the occasion, eyeliner on a night out, no eyeliner for everyday. at least for me

I stopped wearing eyeshadow much, so I am re-learning winged liner to elevate my look. I'm so lost with these hooded lids of mine, lol.

It adds a nice flair. I would say yes, but it's hard to learn for beginners