Speaking very generally about female dogs...
Female dogs are more prone to mood swings. They can be sweet and loving when they're happy – but a bit on the grumpy side if something isn't to their liking. Because they're opinionated, female dogs can be manipulative when they're trying to convince you that they really, really don't want to do something. Now, I'm a proud member of the fairer sex myself, but I must admit that female dogs are experts at The Dirty Look and The Sulk. Okay, guys....I don't even want to hear it, 'k? :-)
Female dogs are often less pushy and "in your face" than male dogs are. Yes, females are affectionate, definitely, but often it's on their own terms. They may request lots of petting, then assert their independence by walking away when they've had enough.
Click on the picture for more information about that dog.