I watched a few episodes of TNG that I hadn't seen in a long time recently, and it occurred to me that Councilor Troi is often compromised, or literally possessed, by alien beings. You can even make the argument that this extends to her being flooded with negative emotions in "Man of the People."
Has anyone else noticed this phenomenon? Was this ever explained in the series as "because she is part-Betazoid," or were we left to make that educated guess?
And, more importantly, in TNG did the crew generally fall under the influence of these kinds of alien phenomena too often?--there are obviously several episodes where SOMEONE ends up compromised like that.