I am currently working on the Great American Aran Afghan. I like some of the blocks and some I am altering to my preference or substituting other stitches from knittingfool.com.
If you don't know about knittingfool.com -- you will just love it. I like working from charts and some of the great stitch patterns do have charts, some don't. What is nice is that you can find a substitute cable which is so many stitches wide and it also tells you how often the pattern repeats. On squares like I am knitting, where the cable terminates is important so that the square looks balanced vertically.
As this afghan is a skill challenge, the other is to guess how tight/loose, each designer knit. The needles range from size 5 to size 8. That is a big difference.
This pattern will be for a housewarming present I am making for my oldest son, and if my youngest likes this pattern too (he is fussy beyond words), I'll do it in superwash wool as he lives in New Hampshire. The rest of us all live in California.
I like it very much and may make use one too as it is fun to change the squares and find other patterns for blocks you are not fond of knitting. It is an older pattern, but found it on Amazon.com for about $14.00. For the number of pattern squares (there are more than 20 -- so you have extra squares to make the front and back of coordinating pillows) then it is about $.50 per square for the pattern cost. That is very reasonable. I am using the Red Heart Super Saver acrylic as I didn't want to invest in Wool Ease by Lion Brand if I wasn't going to like doing this project. So far I have been able to knit all the squares but have had to go back and try some again as I had trouble dividing up stitch increases from the garter edge.