I'm a both person, although I do like the look of liner alone. I usually put liner on top of my shadow and then use an eyeliner brush to press more shadow (the same colour as the liner) over the liner for a smudgy look.

Have you ever seen this product before? It's a liner from www.ebeauty.ca that turns any eyeshadow into liquid liner which looks really cool! I think I'm going to order it!

http://www.ebeauty.ca/Vasanti/Eyeliners/Vasanti-Magic-Liner/pages/productdetails?nav=R:940505

I've been using eyeshadow AS A dry LINER lately!  I love it... It goes on much closer to your eyelashes and it seems to look a little more natural (not heavy).  I just use an eyeliner brush to apply.  I've started to forgoe the whole "eyeshadow on the lid" thing now, but I add a dot of creamy white or vanilla to the inside of my eyes (near the bridge of my nose) and up toward my brows a bit to just "highlight."  Lastly, I add a coat or two of black mascara.  It's simple and quick for a finished eye look.   

i rarely ever wear balck eyeliner, If i wear it, i wear it in silver and only on the bottom lashes. Lately I started using a dark eyeshadow as an eyeliner on top, and when you have the wright angled brush, i have no need for eyeliner at all! :)

i am both.. they are right.. it really depends on one's mood .. but i sometimes do an eyeshadow on my lids.. and a colored eyeliner at the bottom.. i love trying different colored eyeshadows and looks everyday.. when i dont have time to put on my daily makeup routine.. i go to colored eyeliners.. takes less time and can pump up your look in an instant.. but why dont you try both.. its kind of interesting if you mix them all up together.. but dont go over board.. i know its halloween but come on.. hehe

I am a huge fan of using shadow as a liner! It creates a nice softer line. You can also wet your brush to make it more dramatic...even a sexy cat eye!! Play with colors as well as neutrals and have fun!!!

I happen to love both. I have brown eyes and they seem boring to me so I like to spice it up with colored liner.

I've always used eyeshadow.  When I was younger, I would wear eyeliner with the eyeshadow, but now I just wear the shadow.  I'm thinking about using mineral eyeshadow now.