Got my licence a bit over 2 years ago. I ALWAYS use the blinkers. You never know when there's some other participant in traffic that you don't notice for which the information of what I'm about to do is important.
It annoys me to no end that a lot of drivers here won't signal for lane changes or turn offs.
I live close to 97th Street on the north side, and I always think how cool it would be if they put in a tram line on 97th... But no, only cars, ideally trucks. The people suck.