Being a decade-long rugby player myself all this rugby talk makes being on the waitlist even more agonizing !
But whether I'm on it or not, you can't beat rugby when it comes to
1) integrating yourself internationally, as its huge in europe, south america, south africa(the world champs) and the south pacific (if you want some fun search on youtube for 'New Zealand haka', its their rugby teams warmup ritual)
2) Working with a team, unlike the big 4 american sports its very, very hard for one amazing player to dominate a game. There is a reason rugby teams are very prevalent within MBA programs.
3) the social aspect. other sports preach sportsmanship, maybe even trading your jerseys or shaking hands after the game. In rugby the post game drink up with the opposing team is generally standard.