Information that is diagnostically helpful to people more than just developers (IT, sysadmins, etc.).

Information that is diagnostically helpful to people more than just developers (IT, sysadmins, etc.).

Information that is diagnostically helpful to people more than just developers (IT, sysadmins, etc.).

Information that is diagnostically helpful to people more than just developers (IT, sysadmins, etc.).

Information that is diagnostically helpful to people more than just developers (IT, sysadmins, etc.).

Information that is diagnostically helpful to people more than just developers (IT, sysadmins, etc.).

Any error which is fatal to the operation, but not the service or application (can't open a required file, missing data, etc.).

Any error which is fatal to the operation, but not the service or application (can't open a required file, missing data, etc.).

Any error that is forcing a shutdown of the service or application to prevent data loss (or further data loss).

Generally useful information to log (service start/stop, configuration assumptions, etc).

Generally useful information to log (service start/stop, configuration assumptions, etc).

Generally useful information to log (service start/stop, configuration assumptions, etc).

Only when I would be "tracing" the code and trying to find one part of a function specifically.

Anything that can potentially cause application oddities, but for which I am automatically recovering.