I tend to keep the same look unless a certain item really catches my eye then I will spend a couple days contemplating whether or not to stitch. I used to just go for one color from head to toe, but lately I have stitched items of different colors from head to toe now.
I like to keep a look for my wizards, but when i'm out of crowns is when i find better gear and can't seem to battle correctly without it equipped. In other words, i don't find it efficient for my wizards to stitch items, although i would definitely like to.