I've seen lots of fit pics where the guidis looked mad long, as in you could see the balls of the wearers' feet poking out waaay too far back in the shoes. i have a feeling they're buying the shoes second-hand and then just dealing with the poor fit
Few years ago I realized that I have been wearing shoes too tight, just like I do when I played soccer, and have gone up half size in everything, with gave me some breathing room. Sometimes I wonder if I am wearing shoes in a correct size. Especially with Guidi, I heard that they were supposed to fit like a sock, but I have a full room to wiggle my toes and definitely can wear a chunky pair of socks in the winter (which is a plus living in Minnesota). Not sure if I am doing it wrong..
I wouldn't wear them like a sock I wear all my shoes like you, boots, sneakers, everything...since I was younger, playing sports for 5 hours is not a good to be wearing tight shoes your going to get hot feet. But everyone's different so I think it's really more of a preference thing than actual "way" to do things.