But how will I keep all of the foam peanuts from falling out?
But seriously, you must be referring to the difference from a safety perspective, of 3/4 face vs. full face?
I have wondered a lot about this, and I will be trying my full face helmet very soon to see if it feels o.k. for me. One thing I am doing is finding what helmet I like best.
Currently, I don't go on any freeways so my speed is under 50 mph and usually more like around 35. I've also always had a natural talent for tumbling when I come off of things and have a good spacial awareness too. My present crash strategy is to not land, or slide on my face. These help, but I know anything could happen, and when I get blind sided by a little old lady in a Cadillac, I may wish I had better protection.
So, other than having your face exposed, is there anything else that is a problem with the 3/4 face or less than full face design? I have also considered the newer full face that hinges upward at the front. One thing I don't want is the helmets with electronic distractions like cell phone and google etc... built in. That might be o.k. for someone who is very experienced, but I have under 700 miles on my bike and it is my first one.