[platypeese]

The speed at which a person learns a language varies from person to person. You mentioned that Japanese is the most difficult of the ones you've learned so far. Out of curiosity, what languages are those? If they're of the European variety then, yea Japanese is pretty different. Instead of aiming to be as fluent as possible, I would suggest going for the fun factor. It's a fun language to speak and people are generally forgiving when you make mistakes. So don't stress it too much. =)