I'm learning Jap and loving it thoroughly. I really wouldn't want to learn anything else. Italian was awful in the past. Languages based off Latin seem to annoy me.
Body language is pretty much universal though, it would be hard to come up with anything of the sort that would be hard to decipher... Unless you have a girl help you(I don't think anyone can understand theirs), but that's beside the point.
lol, boys wouldn't understand girl's body language but girls would. Still...it's easier than coming up with your own random sounds.
Guys first off: Russian is the hardest language in the world to learn, in fact, alot of russian don't even speak it, it is simply to hard. That's why i would like to learn it, also going around saying: "Comrade do you have a Vodka" Would be pretty neat