I love twitter and check in often. It allows me to follow not only breaking news but writers, architects, politicians, etc. I don't really follow artists although I personally will post comments, ideas or retweet articles I find interesting. The reason I don't follow them is they tend to abuse the twitter post by hawking their work or a book. I like to see there new work and the projects they are up to but the hard sell I can do without.
One artist came out and wrote that all drawings on her website were half off from now until midnight. I quickly "unfollowed"
Another artist keeps plugging his book on amazon, which was published over six years ago. Here's a clue......why not write another book and stop wasting your time!