Baby Doll is used very often and by many boyfriends, when they are trying to convince or cajole their girlfriend.
Lady Love has a tendency to make her feel special, and hence, will help you convince her.
Babylove is an adaptation of Baby Doll. A guy would mostly use this when he REALLY needs to get his girlfriend convinced.
Cuddles shows that you always wish to stay beside her.
Wifey is mostly used when the two of you know that you'll end up together and when the girl knows your every need and can take care of it.
Princess is perfect to let her know that she rules your heart. Well, you could use queen as well, but princess is more youthful, hence a better option.
Pretty Pants can have many interpretations. It will make her feel pretty, nonetheless.
Cookie Monster really shows the cuteness in a relationship when the nickname can be this irrelevant and yet, so cute!
Gillette shows that she is really, 'the best a man can get'! Isn't it cute and oh-so sweet?