Originally Posted by cjs226
For example, I would like a notification for "Call Mom" at 3pm but not for "Install latest updates on Mom's computer".
"Call Mom at 3" really isn't an OmniFocus task at all.
OF was never meant to be your only time/task manager – it is intended to be used for the things that can't be put on a calendar. OF and (your favorite calendar app) are supposed to be used together, with the calendar for stuff that is glued to a specific time and OF for things that really don't have a date/time.
So, in my case "take Daughter for high school tour" is a calendar item, but "re-write paper about daughter for high school teachers" is an OF item. The first can't be done at any time except Thursday at 2:30, the latter can be done any time before August.
I know it feels like a pain to divide out lives into two products, but that is the way OF is intended to work, and the way the developer ninjas will be improving OF.