I forgot how much I used to love Tribes. I was totally late to the party, like by several years, lol, but I played the crap out of it with my friends. I always sucked at it, but it was so much fun.
The vocabulary is a good thing, as most people have said. Other than that I think they're crap games. The little practice mini-games are mostly worthless, except for the flashcard style ones, and you can make flashcards yourself. The Japanese one in particular teaches some grammar points in...