I'm doing art as a career after my comp sci degree and instagram is just perfect for me. The fact that instagram is pics only works very well for visual artists, and I can easily share my work in a relaxed sort of way. There's also tons of other artists on instagram and the way it's set up I can easily see their pieces of artwork much more easily than twitter/facebook.

Also Facebook is a dead zone now. It's literally pointless political junk and rehashed memes shared by "friends". The only usage I have for it is to message my old friends.

Snapchat is also starting to die out ever since Instagram implemented their own "snapchat" feature. IMO Instagram just does it better than snapchat. Snapchat is just too bloated for me. See with instagram I can follow someone like Kanye West, see his life in cool pics and his "snaps" in a convenient way.