Personally, despite my significant lack of artistic skill, I tend to go with the pencil. This is partially down to the fact that I like colouring things, and partially down to the fact that I have never even heard of the other two before in my life!
I also like to use the pencil sketch photo effect on my photos too it makes my eyes POP! ;)
Good day to you ladies, I hope my input has helped you today! :P
I use a pencil eyeliner but my skin seems to be slightly oily so it always runs in the middle of the day and causes raccoon eyes. I'm trying to figure out a way to keep my eyeliner from running but I haven't been successful yet. Lol I don't have a steady enough hand for liquid either. Haha
Either pencil or those pens.pencil for a more smudged look, pen for a finer, percised look. I can totally relate to your link, but my eyelids are asymmetrical anyway, so I have to apply eyeliner in a bit asymmetrical way so that when I open my eyes they look symmetrical. Headache yet?
Pencil: too messy. Does not last. Looks more natural. Liquid: Neat but lasts too long (which is also a positive). Can look too harsh/fake. Gel Pot: Just right. I like Maybelline's. I want to try the ones from Tarte.