It's been quite a time since my last Apple wallpapers compilation. And for me, keeping the very same wallpapers sticking on my MacBook display is a great sin, i.e. they could surely degrade my productivity, which has been relatively low before being decayed by continuous distractions.
These Apple wallpapers, coming with gorgeous color, would probably make you feel more energetic and cheerful. At least for me, it avoids me from being suspected as "nerd" by the opposite sex.