I'd just like to know why EVERYONE in the Threadless community simply hates heather grey.

Personally, I like colored shirts. Brown, light blue, turquoise, banana, gold, dark green, maroon, etc., but heather grey just looks so sharp. However, when I see a shirt on heather grey with a colorless design (Girls Should Have the Right to Vote, Thank You, We're Toast!) it does look bland. But shirts like You Sank My Battleship or Follow It have always appealed to me, especially because they go well with anything.