And now for my opinion...
The twins are arrogant, but not exactly in a bad way. They are self aware enough to try and make money off their looks. But they don't seem stupid about it, they seem to understand that its a business. That there is a line and they want to be respected.
Within the walls of the playboy mansion its likely that they've met alot of Kirks and Frankies. One being a rich kid who thinks he's someone and the other just being a walking hormone ball. They know how to handle it and are strong enough not to let it get out of control.
For the most part they seem quite savvy and they can talk things through together and with others in the house. They are more than two dumb blondes who take their boobs out and brush their hair.