ok, i don't think this discussion is going anywhere, since either i'm not expressing myself clearly, or you aren't reading my posts properly.
I haven't said that it's necessary to enjoy it, or that you NEED to enjoy it to succeed. What i have said is that:
a.) if you are considering knowing japanese as the end goal, and not simply enjoying the process of learning it, it's more easy to become isolated during that period of time where you're focusing on attaining a level that you're happy with.
b.) if you don't enjoy learning languages, you should really consider carefully how worthwhile it is to spend your time learning them, since it's a never ending process, and is going to take quite a long time to get to the point where you can even follow interesting conversations with any fluency. This being the case, you're probably better off spending your time doing something you do enjoy doing. (yes, there are situations where it would be worthwhile nontheless... being able to speak to your spouses family, or things like that. But in general, it probably isn't.)
I didn't intend to insult you, there's nothing wrong with learning a little of lots of different languages to get by more easily in those countries. Perhaps i don't understand the scale by which you're rating them. But i haven't ever heard anyone who is really advanced in any language rate themselves by a scale like that, so i just assumed that's what you meant.
I don't have a language list... i only know Japanese to any reasonable level.
But i suppose if i were to list all languages i know bits of, it'd include french, spanish, german, russian, chinese, arabic, and so on.