Check you like your instructor!

With Karate or any good style of Martial Art, you should be approaching it with a long-term expectation in mind. As almost all Martial Arts and Karate styles are long-term sports. Meaning the aim is to continually get better and better. Becoming as perfect as you can be in every way – in fitness, skills, knowledge, character, and spirituality. With the highest of morals, standards, integrity, principles, and understanding of others. 

In short, you are going to be spending a lot of time with your instructor in the future, so make sure you really like your instructor as you are going to be stuck with them for quite a while!