I remember that whenever I am outside with friends and its mosquito season, I always get the least bites, sometimes no bites. For example if we are in a restaurant that has seating outside, they would be like lets go inside, too many mosquitoes here, I would seriously say “what mosquitoes?”
“People with high concentrations of steroids or cholesterol on their skin surface attract mosquitoes,” Butler tells WebMD.
Mosquitoes also target people who produce excess amounts of certain acids, such as uric acid, explains entomologist John Edman, PhD, spokesman for the Entomological Society of America.
I guess I dont have any of that. 
.:.Link.:.
There are other factors involved in mosquito bites for example if you eat a banana there is a certain substance in it that insects can smell and are attracted to so you would be more prone to mosquito bites if you eat bananas ..
i am not really fond of bananas, except banana milkshakes
oh me me me !! i’m a mosquito magnet :s they are gonna kill me someday! i keep that thingy to plug in to kill mosquitoes in my suitcase wherever i go ! but i dont think i have any of the things you said, or at least i hope so! :/ one doctor once told me it was something in my blood ! dont know what it is exactly … but people like you always bug me .. and they hate me too, coz i always ruin it for them hehehe ;p