Deviantart:
Pros-You can share a wide variety of work, from literature to photography to painting. You can hear what others have to say about your work. You can save drafts of your work on the site. You can view and favorite other's work(s). Easy access to artwork you WANT to see by searching for it or watching someone.
Cons-Sometimes the editor is hard to use. One accidental click to a previous page or on something that you don't want can screw up everything. Sometimes the Wi-Fi can disconnect by accident, and you may have to redo the whole post all over again (*one of the main reasons why I copy things before adding them in or saving*).
Facebook:
Pros-No one will stop you from posting something (*unless its not appropriate, of course*). You can hear a greater variety of opinions by friends and family. It's fairly easy to upload images and videos.
Cons-Your work will not be saved if something goes wrong. Sometimes you cannot post things on there. (*I don't know if any of you have experienced this, but sometimes when posting the keyboard of your mobile version will glitch, which means you have to use the app--I think that's right???*).
Twitter:
Pros-Again, you can share many things. You can get an opinion from people all over the world. There is an easy to access "tweet" button.
Cons-I have come to find out that you are limited to what you "tweet" on mobile (*I do short tweets on my phone and tweet pics on my tablet or computer*).
Aminos:
Pros-There are a thousand of them for you to use. Have a favorite topic? Download an Amino for it! You can post as much as you want. You can edit the post background and/or color. There is a favorites option. You can talk with people who share the same opinions (*or NOT?*) as you. View amazing work, like art or cosplay,by amazing people! Drafts can be saved, even without the internet (*so if you have something you want to post but want to get it done ahead of time without the internet, then here you go!*)
Cons-Some controls take a while to figure out. (*That's it...*)
Hope you enjoyed!