Mera chota pai the most and outside my immediate family my two cousins.
Someone has forgotten how to use the Caps Locks button 
Ditto.
As for hiding I usually have nothing to hide, esp to people who I am close to. My brother knows pretty much everything about me, as I do him, as for banks etc he knows my bank number and I do his.
I think its human nature to be close to someone, that helps relieve pressure in my personal opinion and helps to keep the mind less loaded if we share stuff.