This list is messy, incomplete, includes albums leaked though technically not January-June 2007, and half the singles listed probably aren't even actual singles, but it's the most accurate representation of my taste I could come up with. I have hope the end of year one is better... :)
Favorite albumsAnimal Collective - Strawberry Jam
Arcade Fire - Neon Bible
Architecture In Helsinki - Places Like This
Arctic Monkeys - Favourite Worst Nightmare
Blitzen Trapper - Wild Mountain Nation
Dinosaur Jr - Beyond
Imperial Teen - The Band The TV The Baby And The Band
Justice - †
Kathy Diamond - Miss Diamond To You
LCD Soundsystem - Sound Of Silver
Matthew Dear - Asa Breed
Modest Mouse - We Were Dead Before the Ship Even Sank
The National - Boxers
The New Pornographers - Challengers
Nine Inch Nails - Year Zero
Patrick Wolf - The Magic Position
The Rentals - The Last Little Life EP
The White Stripes - Icky Thump
Least Favorite albumsSmashing Pumpkins - Zeitgeist
Kaiser Chiefs - Yours Truly, Angry Mob
Dan Deacon - Spiderman Of The Rings
Editors - An End Has A Start
Chromeo - Fancy Footwork
Beastie Boys - The Mix-Up
Favorite singlesThe Affair - Left At The Party
Animal Collective - Fireworks
Apostle Of Hustle - Cheap Like Sebastien
Arcade Fire - Intervention
Arctic Monkeys - Fluorescent Adolescent
Arizona - Thimble
Arms - Jon The Escalator
A Sunny Day In Glasgow - 5:15 Train
Björk - Earth Intruders
The Brobecks - Jacqui
Built To Spill - They Got Away/Rearrange
Club 8 - Whatever You Want
David Vandervelde - Jacket
DInosaur Jr - Almost Ready
The Go! Team - Grip Like A Vice
Holly Golightly & The Brokeoff - Devil Do
Hot Chip - My Piano
Illinois - Alone Again
J Church - Vampire Girl Prefers Me Alive
Je Suis France - That Don't Work That Well For Us
The Killers - Ready My Mind
LCD Soundsystem - All My Friends
Love Of Diagrams - Pace Or The Patience
Manic Street Preachers feat. Nina Persson - Your Love Alone Is Not Enough
Minotaurs - Partisan
Smashing Pumpkins - That's The Way (My Love Is)
Wooden Wand - Delia
Least Favorite SinglesFall Out Boy - This Ain't A Scene, It's An Arms Race