Since I recently rediscovered my joy of gaming having finished the wonderful Deadly Premonition on my Xbox and playing Dead Space 2 afterwards and feeling a bit meh about it, I am thinking about finally getting a Wii, since it is probably the current gen system that after all these years has the biggest number of unique and quirky titles.
I am looking for stuff that is a bit out of the box or just plain fun.
I would have a huge backlog to go through and am not really sure what hidden Wii gems I have missed.
I also loved the crap out of the original 2 Katamari games and Patapon and Locoroco, so I am up for japanese weirdness.
Also everything Atlus and JRPGs/Strategy RPGs are fine as well, currently playing Unlosing Ranger vs Dark Death Evilman, liked Disgaea, Persona, etc.
Things I know about and wanna get include:
No more Heroes 1 & 2
Mario Galaxy 1 & 2
Okami
Trauma Center if it's any good
maybe Zelda
Posts
I've heard he sequel is better but I haven't played it.
World of Goo (if you haven't played it)
Some like Kirby's Epic Yarn, but I Found it a bit dull and the narration quite annoying
If you're into some more of the physical games (and/or exercise games) then Just Dance and Just Dance II are pretty impressive and fantastic.
Also keep in mind there are lots of great downloadable titles, particularly the BIT.TRIP series.
My Backloggery
There is really not a lot at all in this genre on the Wii as far as I know - you're far, far better off getting a PS2 and/or a PS3 if you need a serious JRPG/Strategy RPG fix on a regular basis.
Anyway:
All the Wii games you listed are pretty good, and I will second the Smash Bros. Brawl/Melee recommendation, especially if you have friends you can play with on a regular basis - awesome series.
I have a gaming PC. And a PSX/2/3. And an XboX. Even if I'm a fairly casual gamer. And I still do NOT want a Wii. For me it's just a gimmick, and an uninteresting one at that. You can find quirky titles on every system, especially if you look at downloadable options.
So, do you want a Wii? I can't answer that, but if I were you i'd certainly ask myself the question before shelling out money.
My Backloggery
PSN: SirGrinchX
Oculus Rift: Sir_Grinch