Just adding my .02...
I got my flu vax yesterday evening, little sore in the injection site and I'm waiting to see if I'm going to feel like crap today. I am kinda glad to see H1N1 as part of the vax, thought I'm sure there are others who will think differently, lol. After numerous years of always getting nasty bronchitis (and a few bouts of pneumonia on top of that!) I started getting the "flu shot" each year and have been very fortunate not to have been so sick since then
Last year was the first I felt yucky from the flu shot, I had extreme exhaustion, body aches, and a low grade fever for a day or two and then felt fine, and I also did not get the vax for H1N1 last year. I think it's a YMMV type of thing as far as reactions and side effects go