what appeals to you?
stand up?
what aspects of stand up? punching, kicking, joint/pressure point manipulation, take downs?
ground fighting?
what aspects of ground fighting?take downs, ground 'n' pound, joint manipulation/submission?
then you look at which styles offer what you are interested in, then you look at whats close to you, and choose the school the has the best teachers, and teaches what you have chosen (but if it comes down to it, choose the school with the best teachers, you may decided traditional Goju karate is what you want, but if the only decent school near you teaches BJJ, then go for that.)