One extremely easy way for me to tell if someone is still living with their mommy or not is when they tell me $75 is a lot and I respond "Um, $75 is hardly anything for a hobby. I pay $135/mo on cable/internet".

Then, they respond "WTF who the hell spends $135/mo on cable and internet?"

Er... how about almost everyone? Unless you have basic cable with the crappy channels, but the bottom line is if you don't even know about cable or satellite packages and how much it can possibly cost you probably still live with your mommy and she probably pays all of the bills.