hey there guys!

I wonder if any of you AO3 users could help me with a couple questions? 

can y'all name some of the advantages and disadvantages that AO3 has? like if anytime you want to post a story or read one on that site, why would you pick AO3? like I've seen some people who believe that AO3 is the best site to write your stories, even though nothing can replace AFF for me!

lastly which one would you rather? Watpad, AFF, or AO3? and why?

please help me and thank you so much lovelies!