Full disclosure: I work at pretty much the highest level of public health in my state. My son got a flu shot, and I usually do and believe in them, but was too lazy to get one this year. I am in great shape and I got it. So did my son, who got the shot. It seems to be effective this year for some but not all of the strains. The last time I got the flu was the swine flu a few years ago, and that was the last time I had not had the flu shot.
This may sound bad, and I am sorry if it is insulting, but most of the sites you find with the anti-immunization leaning are nonsense that is rejected by 99% of the medical community. I think effectiveness can be debated, but unless you have a specific allergy condition, they are safe. It's all fun and games to be "against the man" or whatever, but this nonsense war on immunizations is just that. Complete nonsense. Maybe I should say it in a nice way, but I think the spreading of lies from websites over immunizations over the warnings of medical professionals is more than negligent. If you really don't trust those doctors, I urge you to find a real doctor that you do trust and talk to them. I go to a doctor who knows me and remembers my previous injuries off the top of his head when I come in and trust him. He would not get rich off of a flu shot and was on the medical staff for one of the top football programs in college football (who pay for results), and he urged me to get one, even when I had the flu to not get the other strands. He was probably right.
If you can and have no allergies, I urge you to talk to your doctor, which should lead you to getting a flu shot. Especially those around kids or the elderly. In a crowded society such as ours, you are not just making decisions for yourself, but for the public at large as well.