OK, so I go the yarn store and think I know what I want and I pick up what looks like a chunky wt yarn but says its bulky and then Rachel (my friendly knitting ninja/store person) tells me its really more of a heavy worsted. Now I have no idea what I want at all. Isn't there any math to this? Why does this rating of bulky, chunky, heavy worsted, etc. seem so subjective. I just read the thread on guage swatches and I feel more lost then ever. So is the ability to figure out the right yarn for a project just something that comes with experience or will I always have to rely on Rachel?