360 provided the best Forza Motorsport games in the series but the hardware was very unreliable until the slim model was released.
PS3 was an epic RPG console. Atelier, Final Fantasy, Neptunia, Tales, White Knight Chronicles. Poor efforts for Gran Turismo and it had YLOD which wasn't as bad as 360's RROD, but still annoying.
Wii is legendary. Wii Sports, Xenoblade, Zelda, Mario Kart, Mario Galaxy, superb for FPS games, Metroid Prime Trilogy and the Virtual Console was so good.
DS was extremely good, but I think the New 3DS perfected the concept. Still, it had many unique games and I hope it's something Nintendo can revisit in the future.
PSP was a huge disappointment, but the game library was quite diverse. I don't have many games for it but what I do have covers quite a few genres. The worst thing was the battery. Any Nintendo handheld still has some charge in it even if you don't use it for months. PSP drained so quickly that it needed to be charged every time I wanted to use it. Total nightmare. I do remember docking stations being available for it, so maybe the intentiopn was to leave it docked so it was always available.