Is there any reason to wear a HAT for davening anymore? Does a YARMULKE suffice? Why are only chasidim wearing GARTELS?

Is a Kippa enough for davening? For Kiddush and Bentching?
Do secular styles impact what we wear and the halacha?
What if your parents don’t want you to wear a hat?
What if your parents want the hat and you don’t?
Did Chasidish garb and the black stripes on our Taleisim come from the non-Jews?
Minyan without a hat or daven be’ye’chidus with the hat?
Should women wear hats for davening as well?