I easily fall for Red Bull helmets. They come with a statement, as not everybody can wear them.
Think of a statement first, a motive. Then go for the design.
PS I currently ride the Speedmax with the limited “humuhumunukunukuapua” color paint. If I had the opportunity, I would love to have the Hawaiian trigger fish on my helmet.
Mostly roadie cycling these days. I like a single color, black, helmet. Goes well with any kit or bike color scheme. Not the best for being seen, but that’s what a colorful kit and lights are for.
Cool graphics on a helmet with an eye catching kit can be hard to coordinate to look good.