Blue is my absolute favorite color of all time.
Mine too! It's one of three primary pigment colors in painting or the RGB color model. Makes sense that lots of people enjoy it!
I love that the sky is blue too. 
And the ocean! It's weird, but most blues actually contain mixtures of other colors, like green in azure, or violet in ultramarine.
There is nothing more beautiful than blue ocean water. Is there a natural mineral that can make the color blue?
The deep sea actually appears blue because of an optical effect known as Rayleigh scattering. Same thing as the clear daytime sky!