I have been on twitter since 2011, and I like the 160 character format more than facebook.
Its a platform where views matter if they are trending.
best things:
Nobody cares whos watching you.
Expressing things in 160 characters is fun.
The follower-following pattern is good and loved by many.
I can choose people to follow which align my interests.
bad things:
Sometimes there are dummny accounts which keep promoting things by writing on my timelines.
Use of abusive language is not common but few sections, especially Bhakts of politicians, celebrities often use such language to people which have difference in opinions