What I considered to be good :
1. Strong characters
2. Good plot
3. Good writing
4. Logical
5. Build an emotional investment on characters

I dont think its fair to leave negative comments, harsh words or give pressure to author on Wattpad to update their story. Its FREE for god sake. We should be grateful to them, instead of complaining about typos and some grammatical mistakes, you can leave a polite comment about it or even better, offer yourself to be their editor. We dont have to pay to read their amazing stories, they give it to us generously. These author on Wattpad should get a polite critique, compliment, and support, so they can improve their stories and maybe someday could make it into some publishing company or being a professional writer. Some writes on their free time. Its saddening how some author apologize many times and think they need to explain some things on first chapter. You dont like it? Then dont read it. You like it but think its lack on some part? Point it out politely, support them to be better. As simple as that.