Guys do you prefer a nice juicy but or a toned flat one?

I'm debating on whether or not to start working out again. My boyfriend loves my new found but but i miss being toned. I also go nice hips. Although I would like to lose 10 pounds I don't want to lose my but and curves. Which does prefer, toned and angular, or curvy. Lets say Beyonce or Gwen Stefani?