I would like to see Activities (Calls and Meetings in particular) entered on the Contact History tab by doing a "Create History" show on my Calendar views as Completed Activities.
Currently the only way to record an incoming call or a chance meeting or drop-in and have it show in the Calendar is to Schedule it on the Contact Activity tab, then Clear it.
From years of using paper diaries and planners I still prefer to use Calendar view as the main way of quickly reviewing the past week/month's calls and activities. Using History reports etc is slower and requires setting the parameters etc, and doesn't give the same quick overview of the week or month that a calendar view does. Also you can't click on a Contact in a report to get into the detail if necessary.
Consequently I never use the Create History function, but also don't like the time wasted on the double entry process to get around it.