Is it normal for fit healthy people in the US to get flu shots every year ? (that is the impression I have gathered)

Over here in the UK the only people that tend to get flu shots are already vulnerable to disease in some way.

Is flu more common in the US ? I have had flu only once in my life and I can't remember anyone I know actually having flu in recent years (a whole bunch have claimed to had flu, but from my exposure to real flu I know you aren't back at work after three days, they just had colds).