The 1 is for tanks, which was pretty cool, though playing all the other atrocious games to get there was not.
Half of the games are boring All but one of the games is truly boring. Half are broken concepts from the get-go that I cannot believe were ever green lit (Find Mii, Pose Mii, Fishing). Those that have sound concepts either have broken controls (Billiards, Table Tennis(!!!), Laser Hockey), or are so dull and basic as to not be worth playing anyway (Shooting Range, Charge).
Tanks is the last game you unlock, so in order to get to the only game which is worth playing you have to complete all of the others. Billiards and Table Tennis are so broken that we just rushed to get them over with as soon as we possibly could (easier said than done in the case of Billiards, alas), and I didn't revisist any of the other games... ever.
I've not really done a very good job of articulating what an awful waste of space this game is, but my vote is deadly serious; it's a compilation of crappy, awful, barely playable games. Even though at the time it was the only way to get my hands on an extra Wiimote, I still regret buying it, and I hate myself for adding to those enormous sales figures because it doesn't deserve a single one of them.