My youngest is 2.5, so I can relate a bit. My style has certainly flexed as I've had to accommodate parenting and body changes!
I have found David Kibbe useful as a jumping off point, although exploring and learning can't be substituted!
I like to stick to soft and drapey things. I like to have a waist, but prefer it to be alluded to rather an emphasized. I like a strong shoulder, and for separates, I prefer shorter length tops and higher waistlines most of the time. I don't like things that are too straight or narrow, most of the time. I like to stick to cool, lush colors and makeup, but I'm not overly strict about color.
You can read my Style Cues in my Profile. I've tweaked them very slightly over the years, but they haven't much changed, to be honest.