Well, I was looking at my CD collection today and I made a list with 10 albums that formed my musical taste, personally all of them were released in 06, because I am only 17 so thats when I began to listening to music, here's my top 10 and I hope that you can post yours

1. Fergie - The Dutchess
2. Nelly Furtado - Loose
3. Christina Aguilera - Back to Basics
4. Justin Timberlake - FutureSex/LoveSounds
5. LANA DEL REY - BORN TO DIE
6. Jennifer Lopez - Brave
7. Gwen Stefani - The Sweet Escape
8. Ashley Tisdale - Headstrong
9. The Black Eyed Peas - Monkey Business
10. Rihanna - Good Girl Gone Bad

Fiona Apple Extrairdinary Machine
Fiona Apple When The Pawn Hits
Res How I Do
TLC Crazy Sexy Cool

Kelis Tasty
No Doubt Return of Saturn
2pac All Eyes On Me
Evanesance The Open Door

I can't think of 10 but I'll do as many as I can
1. B'Day
2. Ok Now
3. The Heist
4. Breakaway
5. 4
6. The Writings On The Wall

1. Amy Winehouse - Frank
2. Lady Gaga - The Fame Monster
3. iamamiwhoami - B-O-U-N-T-Y
4. Pink Floyd - Dark Side of the Moon
5. Amy Winehouse - Back To Black
6. Goldfrapp - Supernature
7. Pink Floyd - The Wall
8. Lily Allen - Alright, Still
9. Goldfrapp - Seventh Tree
10. Lady Gaga - Born This Way

1. All american rejects- When the world comes down
2. Drake- Take Care
3. Ellie Goulding- halcyon
4.Katy Perry- Teenage Dream
5. The Killers- Sam's Town
6. Ke$ha- Cannibal + Animal
7. Robyn - Body Talk
8. Justin Timberlake - Futuresex...
9. Lydia- This December
10. Lady Gaga- The Fame Monster

In no preferential order:

1. Adele - 21
2. Billy Talent - Billy Talent II
3. Bjork - Homogenic
4. Ellie Goulding - Bright Lights
5. Fall Out Boy - Infinity On High
6. Florence + the Machine - Ceremonials
7. Lady Gaga - The Fame (Monster)
8. Lily Allen - It's Not Me, It's You
9. Madonna - Ray of Light
10. Panic! at the Disco - A Fever You Can't Sweat Out

None of them changed my life per-say, but each influenced my musical taste and opened me up to new music tastes.

1.Frank-Amy Winehouse
2.Back To Black-Amy Winehouse
3. Miseducation of Lauryn Hill-Lauryn Hill
4. Late Registration-Kanye West
5. Channel Orange-Frank Ocean
6. Kush & OJ-Wiz Khalifa
7. Baduizm-Erykah Badu
8. Urban Legend- T.I.
9. Lungs-Florence + The Machine
10. Seeing Sounds-N.E.R.D.

1) Pink Friday Roman Reloaded (The Re-Up)
2) Pink Friday
3) Talk That Talk
4) Unapologetic
5) Loud
6) Rated R
7) Good Girl Gone Bad
8) Teenage Dream
9) The Fame Monster
10) Animal

1. Madonna - Ray of Light
2. Madonna - Confessions on a Dance Floor
3. Kelly Clarkson - Breakaway
4. P!NK -M!ssundaztood
5. P!NK - I'm Not Dead
6. Dido - Life For Rent
7. Linkin Park - Hybrid Theory
8. Linkin Park - Meteora
9. Nelly Furtado - Folklore
10. Nelly Furtado - Loose
11. Lady Gaga - The Fame Monster
12. T.A.T.U. - 200 km/h in the Wrong Lane
13. T.A.T.U. - Dangerous and Moving
14. Avril Lavigne - Under My Skin
15. Enya - A Day Without Rain
16. Samantha Mumba - Gotta Tell You
17. Destiny's Child - Survivor
18. Destiny's Child - Destiny Fulfilled
19. Beyonce - Bday
20. Beyonce - I Am...Sasha Fierce
21. Britney - In the Zone

I couldn't list just 10!

that formed my music taste?

off the top of my head and in no particular order:
1. The Fame Monster - Lady Gaga
2. Animal - Ke$ha
3. Talk That Talk - Rihanna
4. Making Mirrors - Gotye
5. All The Right Reasons - Nickelback
6. Fallen - Evanescence
7. The Adventures of Bobby Ray - B.o.B
8. Take Care - Drake
9. Born This Way - Lady Gaga
10. Warrior - Ke$ha

ARTPOP may or may not continue to form my taste.

most of the molding comes from like early to mid 2000s, i was more into the punk meets mainstream rock aspect of that decade (Nickelback and Evanescence), and of course i included the albums that began my sort of dance pop phase (TFM, Animal and Warrior to a certain extent) into a more smooth alternative phase (BTW, Gotye and Drake) which has also made me like the sound similar to B.o.B's album and Rihanna's TTT sound.

but i think i know my general overall taste in actual quality music, it's sort of rock meets dance in alternative meeting them halfway. honestly i think Gotye is the most quality artist of my favorites, only cause he sort of blend my two favorite genres perfectly, pop and rock and adds his own originality to them, that's what sounds most appealing to me.

No particular order
Mariah - The Emancipation of Mimi
Mariah - Butterfly
Michael Buble - Crazy love
Usher - Here I Stand
Beyonce - I am Sasha Fierce
Adele - 21
Bruno Mars - Doo-Wops & Hooligans
The Black Eyed Peas - Elephunk
Destiny's Child - Destiny Fulfilled
Gwen Stefani - LAMB

The Smiths- The Queen Is Dead
No Doubt - Tragic Kingdom
Traci Lords - 1,000 Fires
The Cure - Staring At The Sea
The Cure - Faith
Cruel Intentions OST
Stand By me OST
The Craft OST
Placebo (a mix of albums)
Air - Virgin Suicides
Eliott Smith - Either/Or
Kate Bush - The Kick Inside

But since we're probably talking about straight up pop music, the albums Blackout, Sleeping In The Nothing, Spice World, Aquarium, The Velvet Rope, It's Not Me, It's You!, Stripped, Meteora, (a pop-ish metal), Happy Nation/The Sign...
My tastes dramatically changed as I grew up but one thing remained I love beautiful melodies, and I'm not ashamed to say these mainstream pop albums were filled with them.

Nelly Furtado - Loose
Madonna - Confessions on a Dance Floor
Kelly Clarkson - Breakaway
P!NK -M!ssundaztood
Gwen Stefani - LAMB
Britney Spears - ...Baby One More Time
Madonna - Music
Nelly Furtado - Folklore
ABBA - Gold: Greatest Hits
Lady Gaga - TFM

1. Blackout
2. Under My Skin
3. Hot Fuss
4. Loose
5. American Idiot
6. Day & Age
7. Identified
8. In the Zone
9. Born to Die
10. Back to Black

The only albums that have had a profound impact on me are:

Rubber Soul by The Beatles [1965]
Funeral by Arcade Fire [2004]
Fearless by Taylor Swift [2008]
The Suburbs by Arcade Fire [2010]

The albums that have most shaped my musical interests are:

A Hard Day's Night by The Beatles [1964]
Abbey Road by The Beatles [1969]
Illmatic by Nas [1994]
OK Computer by Radiohead [1997]
The Lord of the Rings by Howard Shore [2001-2003]
Funeral by Arcade Fire [2004]
The Fame Monster by Lady Gaga [2009]

YASSS. Flawless taste