That's awesome man. I agree crossfit workouts are both fun and challenging. It's a good change of pace from the normal strength training and cardio routines. I guess I'm generalizing a little bit because not all crossfit routines and/or instructors will use the same methods. I've heard cross fit involves a lot of max rep sets with little to no rest (IMO no one should be doing until they've perfected proper form) between exercise, which is good for endurance. If you want to great stronger for all the hard work your doing there are definitely better ways. You will plateau eventually if you don't follow some type of periodization.