Muman, I always found the character of Deanna Troi to be annoying. The problem with Star Trek TNG was that it was basically just about yuppies who happen to be in a spaceship. The episodes were mostly about who was getting promoted, who wanted to get promoted, who was dating who, who had a crush on who, etc...
I did like the character of Dr. Pulaski who was the doctor for the 2nd season. I like how she spoke up to Picard.
And the one eipisode of TNG that I liked was called "Ethics" where, where Worf was crippled from the waist down in an accident, and because of it wanted to kill himself. This other dr. came on board to examine him, but this woman had no ethics whatsoever. She just wanted to use Worf as a guinea pig. Of course he was saved by Dr. Crusher (who was also usually kind of annoying).