P: be able to capture additional attributes about people.

Beyond the name, it would be nice to be able to capture additional attributes about people.

For example, I have a large extend family, a few with the same name. It would be handy to be able to differentiate between two Bob's that were born 60 years apart. I currently put the birth year in () to differentiate.

Or friends with the same name, I again use () for some additional data to differentiate them. 

Therefore, it would be handy to be able to create groups and have people organizaed under the group, or have the ability for custom attributes for each person (a fixed number of attributes is fine, two or three would easily handle all my use cases).