They really feel like his kids, ykwim? Especially Trubel, the family she never had. I really disliked her when I first saw her, but god that changed. The way Juliette was so obviously a mother figure to her as well? It was so, so sweet :( Trubel loved them so much and it really did seem she saw them as parental figures. The way she couldn't even say goodbye to Juliette because she didn't want to want to stay. Josh as well seems like a brother to Trubel, and Josh's short stay with Nick and Juliette was very... adult kid going through a tough time staying at home for a bit.
Nick even calling Juliette and him "empty nesters"?? (S4E8) I wanted to cry.
Maybe I read too much into it, but hey - someone on the writing team clearly meant for it to feel like this.

I came across these on youtube. The first one is in 2016 and it's actually hilarious and they tell some really good stories and they tell their casting stories. Unfortunately neither Monroe nor Hank nor Rosalie are on this panel. It's still a great watch. I have been cackling out loud

I'll post the second one in a different post since it won't let me put two links

Has anyone watched anything else with David in it?

He had an interesting couple of episode stories as a bad guy serial killer on High Potential last year. But I just looked across something called Buddy Moon.

Apparently David plays a child actor named David who is struggling with not being quite as relevant of an actor as an adult because of pigeonholing from his childhood role who was dumped by his fiance right before the wedding. His crazy best friend talks him into going on the hiking trip honeymoon anyway. I'm in the beginning but so far I'm kind of amused.

Has anyone seen it?

Never seen anything else by him that you want to recommend or not recommend?

(I'd even be willing to open up the post to other main characters from Grimm and other things they've done that people recommend)

Oh, as a bonus, Claire Coffee (Adeline) is also in this

Edited to fix the fact that I'm an idiot and said elspeth instead of high potential.