Hookup has a unique portfolio layout, it is a moodboard, rather than a full profile.
It allows to catch a sense of person's work, and learn what happens in endless departments of the university at a glance. It can be a useful way of procrastination instead of checking facebook feed ;)
Nothing extra - up to 5 images, 250 char description, up to 6 skills and interests.
Another unique feature of portfolio plate is 'interests'.