Not that notable. He got therapy for recurring nightmares and PTSD after his assimilation by the Borg. Dealing with his trauma was the central theme of s4e2 Family. It was some of Patrick Stewart’s best acting in the whole series, right up there with s5e25 The Inner Light.

What the show didn’t do was make his trauma and recovery an ongoing part of the series. That’s not because they wanted him to get over it, it’s because of the episodic nature of the show. For syndication to work, they needed most episodes to be self contained. This dramatically enhanced the show’s rewatchability, as should be the case for all great syndicated shows.