I've found some beautiful crochet square designs :: flower burst square, victorian dream square and cygnus square, which may not make it as they are a bit complex, and if i worked them in my aran weight yarn, would end up as larger squares than I intend. The last one measures 12" sq when finished.
It seems that a lot of crochet squares look radically different when they are done with added colour yarns or variegated yarns. Sometimes the colour brings out the detail wonderfully, like this one, which is actually a very simple design ::
Some crochet squares are beautiful but the design can disappear when worked in one colour only. So I need to be careful choosing my square designs. I also don't want it to be too 'busy'...I want to stick to a small number of different patterns. I don't want it to be a sampler-style blanket.
I think I might add some knitted lace squares, like this tulip square, and below it the simple vine square (thanks 'vogue ultimate knitting book'...I forgive you for being so ugly, as you are so useful). Neither of these have been blocked, by the way.