From my experience conducting helmet comparisons at sister magazine Motorcyclist, the full-face helmet brand that best suits the most people is Arai. The company makes several models with different shapes that fit different heads. It also offers interchangeable cheek pads in many models to accommodate different cheek shapes. Almost as popular is Shoei (which tends to fit me personally better than Arai or other brands). Other brands that fit most comfortably for some of our riders are AGV, Nolan, FM, HJC, and Bieffe. However, the helmet market is not stagnant. Models are constantly being revised and upgraded. A new version of a helmet that didn't fit comfortably before may change to work perfectly it is updated form. It may also go the other way. For example, I liked the Shoei RF-200 quite well, but the RF-700 was a slight step back in comfort. The next generation, the RF-900, fits better than either of the others. Other makers, some that were once regarded as just budget helmet makers, have made strides and are building very good helmets at the tops of their lines now. The market shifts and the brands that were most comfortable last time you shopped might not be the best any more, while the brands that were not worthy of consideration five years ago have sometimes made great strides.