1. Resident Evil 4: Wii Edition
2. Super Smash Bros. Brawl
3. The Legend of Zelda: Twilight Princess
4. Dragon Quest Swords: The Masked Queen and the Tower of Mirrors
5. No More Heroes
6. Super Mario Galaxy
7. Super Paper Mario
8. Rayman Raving Rabbids
9. Mario Strikers Charged
10. Zack & Wiki: Quest for Barbaros’ Treasure
11. Big Brain Academy: Wii Degree
12. Wii Sport

There's actually only RE that I like...the others are IMO not that good.

Decided to take a tally of the games named here. (Up to Boutros)

Showed:
No More Heroes is the most popular "niche" Mature title on Wii, most closely followed by MadWorld
The Conduit already beats World at War and Heroes 2 in the FPS category.
Umbrella Chronicles narrowly beats Overkill for on rails shooter.
Mario Strikers Charged beats Pro Evolution Soccer.
And the top is a laundry list of Nintendo franchises: Galaxy, Brawl, Twilight Princess, MK, Metroid Prime 3.

Here are the titles with 10 or more mentions:
Super Mario Galaxy – 42
Super Smash Bros Brawl – 41
Legend of Zelda: Twilight Princess – 40
Resident Evil 4 – 35
Mario Kart Wii – 34
Metroid Prime 3 – 31
Wii Sports – 28
No More Heroes – 23
Super Paper Mario – 22
Zack and Wiki – 22
The Conduit – 19
Okami – 19
Resident Evil: Umbrella Chronicles – 16
MadWorld – 15
Mario Strikers Charged – 15
House of the Dead: Overkill – 15
Wii Fit – 15
Boom Blox – 14
Fire Emblem – 14
deBlob – 13
Call of Duty: World at War – 12
Wii Play – 11
Little King’s Story – 11
ExciteTruck – 11
Punch-Out – 10

^^ You have way too much free time

1. endless ocean
2. elebits
3. monster lab
.
.
.
19. super mario galaxy
20. zack and wiki

How Wii Play makes that tally and Endless Ocean doesn't is beyond me. How Wii Play makes the list period is shameful. SSX Blur or Shaun White (mainly due to balance board support) should also be up there. Forgot to put those in my list.

1. No More Heroes
2. Super Mario Galaxy
3. The Legend of Zelda: Twilight Princess
4. Fragile
5. Muramasa
6. Okami
7. Resident Evil 4 Wii Edition
8. Wario Shake It!
9. Madworld
10. House of the Dead Overkill
11. Metroid Prime 3 Corruption
12. Zack and Wiki
13.  The Conduit

14.  Rune Factory

15.  Mushroom Men

16.  Sonic Unleashed or Sonic and The Black Knight

17. The Blob
18. Super Smash Brothers Brawl
19. Godfather
20. Fire Emblem

I order them differently every time, so just take them as a general order.

1. Super Mario Galaxy
2. Punch-Out!!
3. Metroid Prime 3: Corruption
4. Mario Kart Wii
5. Fire Emblem: Radiant Dawn
6. The Legend of Zelda: Twilight Princess
7. Mario Strikers Charged
8. Super Smash Bros. Brawl
9. Super Paper Mario
10. Godfather: Blackhand Edition
11. Trauma Center: New Blood
12. Tiger Woods PGA Tour 10
13. EA Sports Grand Slam Tennis
14. Shaun White Snowboarding: Road Trip
15. Wii Sports
16. Geometry Wars: Galaxies
17. Big Brain Academy: Wii Degree
18. Mercury Meltdown Revolution
19. EA Sports Active
20. Wario Ware Smooth Moves

You made me realize I left out Active & Geometry Wars :(

1. Legend of Zelda: Twilight Princess
2. Super Smash Brothers: Brawl.
3. The Conduit.
4. Okami
5. Resident Evil 4: Wii Edition. Excellent games are above the line.
---------------------------------------------------Line that separates excellent games from good games
6. House of the Dead Overkill. Good games are below the line.
7. Medal of Honor: Heroes 2
8. Super Mario Galaxy
9. Super Paper Mario
10. Guitar Hero series.
11. Rock Band series.
12. Rayman Raving Rabbids. Good games are above the line.
---------------------------------------------------Line that separates good games from bad titles.
13. Wii Sports Bad games are below the line.
14. Mario Kart: Wii
15. Metroid Prime 3: Corruption
16. No More Heroes Bad games are above the line.
--------------------------------------------------Line that separates bad games from crappy games
17. Excite Truck. Crappy games are below the line.
18. Call of Duty 3.
19. Red Steel.

you really are a critic if you claim that Rayman Raving Rabbids is "good" and Metroid Prime 3 is "bad"