I own:
We're on the Same Level
Nineteen Seventy-Five
Sounds of the Sea
The Average Bear

I've bought for my brother:
Refrigerator Running
So Far, This Is The Oldest I've Ever Been
...Interpretive Dance

If I had the money and I controlled the Threadless reprint process, I would own:

A Cloud of Choices
A Is For Jerks
Cowichan
Diabolical Hot Dog
Earl Grey
Foxy
Funkalicious
Get Back to Nature
Lions Are Smarter Than I Am
Monster Wash
Mosaic Messiah
My Green Forest
Never Take Your Abilities For Granted
Obi Wan Kerrist
Pirate Infested Waters
Psychedelephant
Sailing The High Trees
Skip Dessert
Still Life With Van
Strange Birds
Take Me To Tokyo
The Optical Illusion Kid