Three of my four kids could not care less about what clothes they wear, so I buy everything for them. My fashionista has always been picky about what she wears, so I don't even bother shopping for her unless she is with me!
I have two boys (9 and 7) who still let me pick out what they wear each day. And I have a 5yo daughter who doens't really care what she wears either. I have a feeling that will change as she gets older though.
My boys could care less what they wear but I do get them things they like and will wear. My youngest loves sweatpants so has about 8 pairs. I do buy fun shirts with things on them that they like, and still buy matching pjs (ages 7 and 9). For shoes, they come with me to try on.