To my everlasting shame, I once ate in McDonalds...it was predictably crap.
Reasons for not going numerous....and well summed up here, in a bit about the infamous McLibel trial.
http://www.mcspotlight.org/case/ My boys were little....and the ex missus, persuaded me that I was inflicting some sort of cultural deprivation on them, by allowing my politics to get in the way of them being normal kids.
Not wishing to cause a ruck over something petty, I acquiesced....the thing that most disappointed was the pathetically small portions.