What I love about roguelikes, is how much they can instill a significant amount of fear and excitement in you, despite the adventures happening in a fictional environment; you get severely punished by making mistakes, so the game feels too real! To me, it feels as if roguelikes strengthen some positive qualities in you, like patience, perseverance, strategic and tactical thinking, adaptability, all of that and more, because if your character or group of characters die, it's not like in other games, you don't get a second chance, all of that progress is gone for good.
Roguelikes impart some life lessons, how sometimes you never get a second chance, how long term planning can go down the drain because you didn't pay attention to the present happenings, or how focusing too much on the short term can spell disaster in future endeavors, because you didn't prepare well enough for those "what could possibly go wrong?" moments. The roguelike genre is one of the most demanding genres out there, expecting you to take the hit like a champ and keep going. I don't think my prespective on games will ever be the same after playing roguelike games, sometimes I even end up playing non-roguelike games as if they belong to that style of gaming, just so that things feel a bit more lethal, a bit more gritty, and plenty more fun!