Welcome in, Rod
My girls are part of my family, along with my cats, who are also dolls (can't keep pets where I live).
Mostly they're lingerie models or wear smart dresses as I love those clothing types
Sometimes casual but only if it fits a theme; otherwise Azrael has a style of her own as I bought her as a sci-fi cosplay model (a 'dark angel' character).
Ultimately how you dress them will depend on why you bought them and, also, random chance where you think 'Hey, this would look good'
If you eventually invent a character in your mind for each of them, you may end up dressing her how you think she'd dress herself.