I never turn the computer off though lately I've been letting it sleep at night. It's on a UPS system. Our power is quite reliable here and lightning is rare in the pacific northwest. In other regions I might shut the PC off when not in use.
I've recently relocated the organ console so that my computer workstation is behind the console as I am constantly programming encoders and changing configurations, most recently to have piano and bells on my fourth manual when playing three manual organs.
This is my one all-purpose PC at the moment as my Mac-mini is doing emergency service for the holidays at a church that had lost the full use of their existing electronic organ.