Leigh, I think your stocking is lovely.
Your embroidery is well done and the stitch size is consistent. I like the folded flower on the yellow, it tones down that piece of fabbie. And nice placement of the stamp motif 'thru' several blocks.
The only thing I would say is, don't be afraid to embroider and embellish, but that can be a personal preference. Some CQ will focus on fabric, some on embellishment, you have to find the place where you are happy.
A really nice job, and a wonderful, thoughtful gift for you mum.
Keep on stitching 'Crazy' Girl...you cant go wrong!!