What is better for self defense in your oppinion kickboxing or karate if your in a fight?

Kickboxing. Karate is too stiff and 2 dimensional. Plus with KB you start fighting right away, Karate will require you to waste your time learning katas and the like. Muay Thai would be better than even KB since in MT not only do you use kicks and punched but also elbows and knees (which aren't allowed in KB). Also learn a grappling art like juijitsu or wrestling in case things do to the ground (which is inevitable sooner or later).