I've got 5 helmets and I try to cycle through them all each time I ride.
AGV Pista GP Soleluna Monster Edition - Best looking helmet out there. Period! So I had to have it.
AGV Corsa Hand Print - Don't know why but the helmet definitely grew on me and I got it at an amazing price and couldn't pass up on it.
AGV helmets don't fit me well AT ALL. In fact, it is borderline uncomfortable but I'm still in the process of breaking them in so I'm hoping they get better soon. Regardless though, I would still buy them and plan on buying the Shark Helmet when that comes out.
HJC RPHA10 Plus Carbon Jorge Lorenzo - This helmet is very light and super comfy. The carbon just looks killer with the color combos on the helmet. Again, got it at a steal of a price so I figured why not.
Shoei X12 Bostrom B-Boz 2 Helmet. Definitely heavier than the previous 3 helmets I've mentioned but it fits like a glove and the overall comfort for my oddly shaped head is 10/10. This was my first helmet I got 2 1/2 years ago.
Bell Star Spirit Helmet - Like the X12, this helmet fits me like a glove. Another 10/10. It vents well and got this on a black friday deal last year for dirt cheap. Was definitely worth it. I wouldn't get rid of this helmet even if the day came and I had to start selling my helmets.
I wear earplugs when I ride so I can't really comment on which is louder and all that. I'm always hesitant to reach for the AGV's when it's time to ride only because of the discomfort. All my helmets are size XL and the AGV's are still realllly snug. When I used to have a Shoei X-11 10 years ago, it was a size L and fit just fine. The AGV helmets are still my favorite to look at though. It's great to have options.