I have more female sleepwear than ever. On balance, I prefer long cotton gowns. They can be soft, pretty, warm, and very feminine, for sure. Yet at times I like to wear the shorter, shinier, smooth silky type nightgown (does not have to be real silk) or PJ sets.
Some of these longer, dress style nightgowns you can wear beyond sleep time at home if you are not expecting guests. Or just put a matching robe over it.