I'm currently hooked on garter stitch on 5mm needles. When I've not been working on the handspun log cabin blanket I've been working on this.
The yarn is Artist's Palette Buttersoft dk (shade BS7009 in case you're interested) and it really lives up to its name. I am foolishly entranced by the colour changes which work so well in the garter stitch. If there is pooling going on then I've not noticed it.
As for the pattern - let's just say you'll be surprised.