Shoots of color
Although I grow a lot of bamboo by most gardeners' standards, I grow a lot less than some bamboo collectors who have 100, 150, even 200 or more different species and varieties. Still, I have enough different types that I can appreciate the allure of shooting season.
Bamboo shoots of one species are exciting and can be lovely alone, but only when you get a few different species shooting at once can you really see the comparative beauty.