Resonance / Blackwell series / Gemini Rue.
I found the plot, characters and storylines were deep and interesting in those games.
If you like point&click / adventure games, you can't go wrong with these.

I just watched the "WTF is ... Brothers : a tale of two sons" video from TB's channel. I think it relates to that topic perfectly well.

Sidenote : this is one of the most interesting video of TB in my opinion. And that game seems amazingly well crafted.