Tropes are great and an important part of the game. Part of the fun of tropes is subverting and reaffirming them.

I get that you want the game to include specific tropes. All groups do this to one degree or another. I fully agree. As long as you don't tell the other characters how to feel, what to think or how to act, you're doing the game no disservice.

Just don't point to the book and say, this is the right way to play. The books agree, it's up to the people playing to decide this.

My favorite trope: adventures are a bunch of outcasts and misfits.