I deal with the three "major" networks like so:

Facebook - Accomplishments/events I want shared out to a broad network. Highly "filtered" view of my life (and my friend's lives).

Twitter - Less content but less filter, more off the cuff thoughts or broadcasting something I find interesting to a broad network of followers.

Snapchat - High content, no filter. Snapchat photos can be "bad", things in them can be mildly inappropriate, and the broadcast distance is relatively small.

If you don't personally see the value of a low/no filter network with your friends, then it probably isn't for you.