To be fair, there are some really decent sub-communities within twitter. If I just used it for music, promoting my own stuff, interacting with other artists and fans it would be all cool. That side of it is great.It used to be great.
Instant news/sport and a community to chat about it.
With the ability to moderate your own experience.
That really started to change last year and now its a mess.
But I'm a sucker for shouting obscenities at tory supporters, notable world figures and following/chatting to other Evertonians, so most of the negativity I bring upon myself lol
Who you follow and interact with is going to (for the most part) shape your experience on there.