Didn't Seem To Be Listening.

I try to vary my team talks and not just say the same thing, because I understand that Players won't listen to the same thing over and over, however, despite varying team talks, my players seem to always not be listening to me - Should I bother talking to them at all?

Search for Wolfsong's team talk thread in Tactics and Training tips forum. But, be warned: you might lose the fun of figuring out things on your own.

To answer your exact question: you should definitely talk to them.