This is a fun basket weave pattern! Not sure about it for a sweater, but I like the texture for, say, pillows or a hand bag. (And of course, I love the purple!
Forget Edna's advice: Capes are awesome.
Ravelry: Project Gallery Crochet Springtime Friends Hoodie pattern by Anji Beane
The Mediterranean Crochet: Crochet Girls Coat Is a Colourful Free Pattern