I also use a 3/4 and a face shield. I look over the shield, especially in the rain. Shield is usually all the way down. 3/4 helmets are quieter for me and easier to get on and off. I have a full face but hardly ever use it.
Flip face for me. Currently an HJC Symax, may upgrade to a Symax II. I like having full coverage on my face. I've been hit by debris right on the face of the helmet too many times to be comfortable with nothing in front of me. I also ride looking through the windshield but have still been hit numerous times. I tried the half helmet and looked at the 3\4 but couldn't bring myself to buy one. The flip face allows you to pull it up and get a little more air at stop lights, fuel stops, etc. Many will argue that the flip isn't as safe as the full face. Probably true, but it would depend on how you hit as to whether the design would be a factor or not.
Modular flip face... all the time, just prefer the full face protection. Nolan N103.
I look through the windshield, I would prefer to look over it, but I'm not tall enough to do it with the shield all the way down, the top of the shield line is right in my line of sight.... so I raised it a few notches. Works fine.
But, in serious rain, I do have to drop it and sit up and look over the windshield...
I have found that riding it with the shield down results in a lot more buffeting of my head... with the shield raised a little, the airstream clearly goes over my helmet... making a smoother ride for me...
Before getting my Wing, I rode a Kawasaki Voyager XII. I wore a 1/2 helmet for years riding that bike because it was so comfortable. Then I ran into an EMC nurse at a dog show. She takes the ride in the helicopter with people flown to shock trauma. When I told her I was getting a new bike (Wing) she shared her experience. Full face is the only helmet that fully protects the head and face. Now I only wear full face. I have found some full face helmets that have excellent ventiliation, so they are not too uncomfortable in the summer.