A lot of the kicks I throw are defensive distance creators to give me space, so for those I do pull back. When closing distance such as with thrusting or skip in type kicks I don't pull back but rather follow through in order to get inside. As for setting up kicks with punches it depends. If they are moving away from me after the punch then it's follow through. If I didn't make good contact and they are standing in place or moving sideways then I pull back.