I used to avoid them but I would always get an aggressive flu a few times during the year. I finally got a flu shot last year (it might be a coincidence) but I was flu free for the full year.
That was my experience, so I got my first one last year. Twice during the flu season I got flu like symptoms, but only lasted 3 or 4 hours each time. I am scheduled to get mine on Oct 5 at work. If I am going to wait in line to get shot, I may as well get paid for it