We have a thread (it's pretty much dead, however) about current languages, but none about the ones you want to learn.
And so: what modern human languages would you like to learn, and which of those are you learning?
Include an asterisk with those you are already fluent(or partially) in and are still improving yourself.
I am currently learning the following (all of which, not including the first two are the result of a bet), by level of experience:
1) Mandarin Chinese (simplified)*: took classes in high school and still learning advanced concepts (and I'm still not so good at writing, and to think my handwriting was bad enough already). It was actually harder starting out, but once you can start pronouncing (each character can have up to four different tones) the words right, it's very easy to learn. Grammar is pretty straighforward and similar to English. E.g. "ta shi ge ren" is literally he/she/it is a human (depending on how you write the character. Note that this is not always the case). Study 15-20 minutes per day. 4000-4500 words, spoken language is totally fluent (aside from accent).
2) German: classes right now and learning alone. Due to its relative simplicity compared to Chinese, my knowledge should reach my English and Chinese level within a year or two. Easiest language so far. Grammar can differ greatly from that of English, but I caught on pretty quick. 1+ hours per day, including studying for exams. 400-900 words.
3) Spanish: am learning alone. Grammar is fairly similar to English; the only obstacle is learning the vocabulary and pronunciation 200+ words; simple phrases. Common language in the US.
4) Japanese: It's pretty annoying that Kanji is identical to Hanzi. The only differences are the pronunciation. For example, the island nation of Japan is 日本(国) in both Chinese and Japanese except that in Mandarin Japan is Riben(guo; roughly translated to the Sun Nation) and in Japanese it's Nippon (which pretty much means the same thing) and some other word which I forgot. Easier than Chinese, but time constraints, lack of motivation, and language confusion are definite obstacles. Grammar is also vastly different from English. Don't wanna continue learning, but I don't go back on my word. 100+ words; I suck at this language.
5) Latin: Relatively good progress so far; grammar is complex but words are easy to say. Several hundred words, most of which are either English roots or scientific terms.
I also want to learn French, Russian, and other world languages, but to learn that many at once is crazy.
And yeah, mostly languages with easy grammar (by that I mean similar to English to some degree).