IMHO a healthy person who doesn't work in a hospital, with kids, or with the elderly, probably shouldn't bother to get a shot. If you are over ~55, have an illness, or under ~12, you should get a flu shot.
As someone else pointed out, it has a lot to do with personal preference and availability of the shots. I have not heard about a shortage this year. In past years, when there have been shortages, then I think they should have refused to give them to people in the above category.
I get one every year, I’m 41 and one of the healthiest people I know, except for the pesky type 1 diabetes I've had since the age of 12.
I don't react to the shots at all. If I reacted the way some on this list do, I still wouldn't get the shot. The flu is a bummer, but I don't think it's going to kill me.
I also get them free through work. I know the employees would have a fit if they weren't offered, but since the working population is mostly young, mostly healthy, I've always wondered way they give them out to everyone. I also saw that the Target near me is offering them for $7 this year, so cost isn't too much of an issue.