Okay, so I agree with some already stated:
Eminem - Recovery
Like gavin, really gone off him, but he has really come back, done what he can do best, and got everybody to like him again and earnt lots of money on the way. I'm sure he'll be very pleased with that outcome.
Pendulum - Immersion
Amazing album. Before I have always thought, with bands of this nature, that they have 2 or 3 amazing tracks and the rest are kind of 'filler'. This album just has killer track after killer track, really the album of the summer I reckon.
I was going to say Fever, but I've changed my mind. I really liked it when it came out but the novelty wore off extremely quickly.
Others I'd like to state:
Tinie Tempah - Disc-Overy
Just awesome, have tickets to see this guy in February. It's gonna be a pretty good night.
Eluveitie - Everything Remains As It Never Was
Never head of them? Check them out if you love metal and folk music. Pure genius.
Reckless Love - Reckless Love
Pure awesome 80s cheese, absoltuley amazing stuff.
Deftones - Diamond Eyes
Not often bands you once liked many moons ago produce something worth listening to, but Deftones bucked that trend this year and really released some killer stuff.
Lostprophets - The Betrayed
A bit guttingly, this is my most played album of the year. But it has some really good songs on it and nice to see they got rid of the crappy, 'look at me you 14 year old girls' style.
You Me At Six - Hold Me Down
I didn't like this abnd at all until I heard this CD and it really blew me away, a really good disc and a band that are this style without being all cliche emo crap. Good to see that.
Rise To Remain - Bridges Will Burn EP
A very good band, yet to release a full album but a great combination of heavy music with some brilliant singing. Expect a lot from this band in years to come.
Alkaline Trio - This Addiction
Similar to my Deftones statement, I was extremely impressed with this. This album took a while to grow on me, but I really feel like this band have perfected what they are good at and it shows through this brilliant music that they have created.
Angels and Airwaves - LOVE
An album you can get free from their website! A disc with crap reviews, but I love it. A great sound, and it's such a relief to hear music so positive and optimistic for a change.
Finally, as a little side note of albums which are still some of my favourites of the year, but do not show the bands full potential at all:
Story Of The Year - The Constant
Such a good album but dissapointed that the band really have changed their style of what made them unique. The solos have gone and been replaced by more catchy chords and singing. A great album, but not reflective of the bands best work at all.
The Gaslight Anthem - American Slang
Again, not reflective of the bands best work at all. A good CD, but from someone who adores every album by this band except this one, they must have done something different, and it really is a shame.
Overall, a good year for music I'd say! I didn't expect me to come up with so many albums!