To be honest, I enjoyed all of the features provided by ApplicantPro. But most of all, I really enjoyed using it to post applications and job descriptions and to mark the statuses of applicants. Those are the things I found most useful.
In terms of extra features, I would suggest a general human resources information system where I could actually enter information about those we hired, including the benefits information, and have the benefits information linked to the benefit vendor websites, like for medical, dental, and vision.