Look at what you're aiming for. If you wish to do business that will take you far if you're looking into entering the Asian market, learn mandarin - there's a lot of news that China is developing at the rate of 5 thousand bunnies reproducing at the same time. Nowadays it's a basic requirement if you wish to get promoted faster in places like Hong Kong, Singapore and Malaysia.
If you're planning on doing business in the Americas (North and South), Spanish is your best bet - but if you're looking into Canada only, go for French.
If you're looking into Anime, Japanese for obvious reasons.
If you're looking into fashion design (which I highly doubt you'll go into) or music, do Italian.
If you're staying within the science research or some extensive literature...uh...maybe Latin?
Really, it's up to what your plans are.
- Amantis