Typically I'm a Shoei wearer (Currently a GT-Air2) but over the past few years I ventured out to other makes. Schuberth was my first step into both another make but also into a modular helmet. I bought the C3, then the C3 Pro, I skipped the C4 and C5 and went with the AGV Tour Modular. In between that, I also bought the Schuberth SR1, and found a screaming deal on the SR2, so I bought that model too. These two were my track day helmets and the SR1 proved to be a great helmet but ultimately sacrificed itself for me in a high speed crash at the track. I actually came out pretty unscathed, other than a dislocated pinky and torn up gear, I came away walking upright and no limping. Along this time frame, I saw and fell in love with an AGV K5S and bought it on the spot. I know, I know, get to the point D!
Other than the first C3, which had a little "hot spot" in the forehead area, which broke in after a few weeks of riding in it almost daily, all of the helmets had a very snug fit. They still do, but they're slowly getting more "wiggle" room but not enough to feel unsafe. My daily helmet is the AGV Tour Modular and the street/sport helmet is the K5S, and off and on I'll go back to the Shoei. But if I'm being honest, I really prefer the AGV helmets over the Shoei now. For some of the same reasons mentioned above, light weight and great field of view. If/when a helmet feels a but too tight, I'll wear it around the house for a while and see if I start to feel fatigued or if I stop noticing the feeling. One of my Shoei helmets, which I bought online, was like that. I was at that time, was in between sizes, so I went with the smaller size but immediately new I went in the wrong direction. I wore the helmet in the house for about 15 minutes and new by that time, it was the incorrect size. Returned it and got the next size up. Still snug but not overly tight.
Anyway, I hope this was helpful.