My fav combination of diapers and an outfit is actually kigurumis, like that stitch one I have! However, because they cover up my whole body, I can understand that it’s kinda boring to look at. I tend to settle with wearing comfy pyjamas, so that I can feel like a smol little kid, and the pictures still are interesting to look at ^^. Cute pyjamas tend to be shorts (or removed shorts), so then I have to cover up my legs with socks. It’s all so weird and makes no sense. As long as I can feel like a kid, and it doesn’t make the pictures look boring, it should be okay I think