Personally, I bring 4 large bags full of dice to the game when I'm not hosting, each bag full of dice with a unifying color palette.
I choose a bag depending on...well...sometimes the PC I'm playing, sometimes the music I was listening to on the way over.
While setup is going on- which, since I'm also bringing the minis, I'm a part of- I sort the sets I'm going to use...and then the rolling begins.
I'm always rolling my dice. Roll, roll, roll. Usually, that means playing Mason over and over again, but when it comes time to make roll for the game? It's go time, no mucking about. Nobody waits for me to roll.