My first webtoon if I remember correctly was '19 days'. I was not aware that this was a webtoon and treated it just like a manga. I was confused at first because i was reading it from right to left. Also I didn't know a page was usually that long, so I usually missed out some of the panel. I was an idiot back then.
Now I'm completely obsessed with Korean webtoon. My favorites are Lookism, Blood Bank, What lies in the end and Killing Stalking.