I can't stand Instagram. It's for the social addicts, and I have social anxiety, don't go out much, which means I don't have many opportunities to take pictures and post them online.
I can't stand twitter. Everybody ignores your tweets, even if you manage to be popular. I think it's a perfect tool for geeks and fanboys to share their passions, but I don't fit this category so
The only one I used to like is Facebook. But now people only post and share crap. It's become a torture. I can't remember when I last posted anything. I wanted a social network like facebook, but where people would post interesting things and not self-promoting posts.