LinkedIn - gimps.
Facebook - overcrowded space of gimps you used to know but don't really anymore.
Instagram - hot tub gimps.
Twitter - the tough one - I've had it since 2009 so I'm on a good run, it's all set up as I like, I've got stuff I don't want to see (e.g. rugby or racists) blocked and phrases/hashtags muted so they don't appear, people who post good stuff but retweet a load of shite you can turn it off. I am pretty happy with it. It's far from perfect and if I was signing up today and exposed to everything on there without anything listed above I'd probably only last a few days now and just patch it.