Shaak Ti and Luminara looked too much like nuns to me. Instead of a ruler coming at you to swat your hands, they've got lightsabers...
Well, the Jedi Order is like a convent in the sense that they are forbidden to have relations and have lives filled of study and practice all the time
I don't really see many Jedi running around in that type of clothes ether. I would think yes, they are able to practice some of the customs of their people, but would still need to follow a code of conduct and rules when it comes to most things. Take the Police for example: they all are similar in appearance, but they are able to keep a piece of who they are in how they wear their hair and stuff like that. Also you can spot an Officer no matter where you are, because of this. Jedi being the guardians of the galaxy, wouldn’t that hold true for them too?