Would be great if we could filter contacts based on a field. This would allow us to pull up, for example, all contacts within the same company but also "tag" contacts by using a custom field and then pulling up all of those contacts.

For example, I would use a custom field to tag someone as "coach" or "professor" and then in all contacts, I'd be able to filter for "custom field = coach". Something like that :)

Actually, might be even better to be able to tag people and then filter on tags.

Edited to add: I realized I can use groups to tag people and sort people.