Am I just a curmudgeon, or what? I typically signal my turning intentions with an arm pointing where I'm about to go. I've noticed that few cyclists around here bother to signal. It is so uncool to signal? By the way, I use my right arm to signal a right turn, as opposed to the old bent left arm which people used to use in their automobiles way back when, since their right arm wouldn't stick out the window.
You folks signal?