I have a problem with getting mad at games, smashing controllers, punching things (the floor, the wall, my knees, etc), I've destroyed keyboards, game discs, and damn near screwed up the relationship with my woman. I was a childish jerk who unintentionally made others suffer due to my lack of control over my own anger and rage, and I didn't know where to begin fixing it.
Then I started playing with my dorfs and it just kinda stopped happening, from very infrequent, to not at all... I haven't been rageful or destroyed something related to a video game since 40.14 or so. Last time I did get really screaming smashing things pissed I actually had a good reason for it: I was cleaning the guttters and didn't notice the wet patch on the deck under one foot of the ladder so while I was up about 11 feet off the ground I felt the ladder start sliding.
"FFFFFFFFFFFFUUUUUUUUUUUUUUUUUUUUUUUUUU..............." *clunk*
Big goose-egg on my forehead, gash on my leg, various scrapes, bent the ladder in the fall, ended up hurling it across the deck and cussing loud enough for the neighbors a couple streets over to wonder what was going on before I went back inside and calmed down.
That may have been an overreaction, but at least it is understandable, where not being able to do that damn dancing mini-game perfectly in GTA: San Andreas leading one to smash the game disc with their bare hands is not.
I love df because I have never gotten mad at this game, despite all the screwups I've made, all the stupid deaths, all the ridiculous ways I've lost fortresses (I didn't know how to brew booze for a lot longer than I should have), and lately all of the nonsense I've had happen in adventurer mode... it's ok, nothing to get mad at, and as a result it has helped me deal with and control my rage everywhere else.
I love df because losing isn't just fun, it's good therapy as well.