I too appreciate the sun protection of a helmet compared to wearing a hat because of the air moving better through, but hey, whatever works for you.
Personally, the weight of my helmet doesn't give me any sore neck issues, even after a 600 or 700 km week, and I'm a pencil neck sort of guy--again, that's me.
I knew this was going to go through the whole belittling phase. FIY, it's not that I can't, it's because I 1) don't want to and 2) because at the end of the day the extra weight is still more uncomfortable than if the weight wasn't there, especially if looking up at the sights/mountains a lot. If you keep your face facing the road I suppose it's not as big of an issue.
Next we should start comparing deadlift results and body part sizes to determine the tougher guy, eh?