Female Fatale - I need one. Morrigan, Isabela and Miranda were all awesome to romance. There's just something irresistable about the femme fatales.
Best Friend/ Loyal Ally - A game wouldn't feel complete without this squadmate. We all need someone we can kick back and relax with or discuss our fears with. I felt so lonely in DA:I without a best friend.
Comedic Relief - Remember Conrad Verner? Well, someone along those lines (especially if they were on the ship) would be great source of entertainment.
Stoic/Serious Warrior - This one never gets old. They're so serious and so disciplined that I can't resist poking fun at them. Cassandra and Sten can confirm.
A good villain - Seriously, not another Crapyheus. The guy sucked. We need someone like TIM or Loghain or the Arishok. Someone we are against but can also sympathize with.