Why should I use a Twitter?

A lot of people ask the question "why should I use a Twitter?" rhetorically, with the mindset that it's a bunch of useless information they don't need to know or that it's good for stalkers. I added ten people to my "following" list on Twitter just now, and there are different types of "news" I am going to receive from each person. Some people call it useless information; I call it news.
First I added The TV Guide and Funny or Die. I can find out updates about TV listings and more , and I can get links to hilarious videos without even having to go to funnyordie.com. Looking at my "following" list I realized I wasn't following any actors or actresses. I added Bob Saget, Ben Stiller, and Kevin Spacey. If you like a certain actor or actress you can get updates on movies or shows they're working on, and shout outs about other things coming out. For NBA news I added Paul Pierce, Steve Nash, and Derek Fisher. Pierce so that I can get Celtics news (because I'm a Celtics fan), Fisher so I can get Lakers news (I hate the Lakers but keep them close), and Steve Nash because he is second to Shaq for the funniest person in the NBA. To top it off I added Conan O'Brien and Snoop Dogg just for laughs.
A lot of people don't realize that you can get actual real news from Twitter, and sometimes you can get that news before it's even published by the mainstream. I used to think it was useless until I tried it, and I've come to realize that almost all of the people who say it's useless have never tried it.