As much as I love Marina Sirtis, I thought Deanna Troi was about the most useless character on the show. I don't know why Picard had a counselor on the bridge. Other than her ability to sense thoughts, she was useless.
Deanna: "Captain I'm sensing a deception from them."
Any experienced commander could have read someone's intentions. Besides it was always too late when she told him that, they would fire on the Enterprise right after. Why would any Captain let the fucking psychologist command your ship? or Fly it for that matter.