I never get the flu shot. A former co-worker once talked about how his wife has all of this health problems that has essentially made her bedridden and it all started with a flu shot. I know that her case is extremely rare but I just don't want to risk it. Some years I get the flu and some years I don't. I just take my chances and let my body fight it. Staying hydrated is key and get plenty of rest.
I haven't gotten a flu shot in years. The last time was around 8 years ago? I think ... I got really sick and decided then that I would not do it again. Thankfully, my kids don't have the same kind of reaction.