Wii's size advantage (Wii delight #002)
Though the too-short sensor bar wire annoys those of us who use projectors for gaming, and though it is ultimately larger than the "three DVD cases" size that Nintendo promised us at E3 2005, the Wii's wee size and friendly shape make it a snap to squeeze it into your existing home entertainment setup. Thanks to its square shape, it'll stack nicely. Thanks to its tiny size it'll fit into spots that are too small for the larger Xbox 360 and larger-still PlayStation 3.
If you own a Wii, you'll have no problem finding a place for it, and we have to admit that's delightful. (There's one clear advantage to using souped-up GameCube architecture: they've been working on shrinking some of those components for years now.)
PS3 delights vs. PS3 annoyances
Wii delights vs. Wii annoyances
Xbox 360 delights vs. Xbox 360 annoyances
