To get back to Rugby for a second: I think Rugby is a much better Sport that A-football. I mean, football's roots are Rugby, but they Took out the Rule that you are not allowed to pass forward, which is pretty much the basic idea of the sport. I find that kind of dumb. Also, a Rugby Game is much more fluid, Not interrupted every 10 seconds. There are actually points scored without set pieces.
To the Main debate: I love soccer and I like hockey, and I think that the fanbases of the 2 sports are similar: in fact, the basic idea is the same, to put a ball or a puck in the opposing Goal, while overcoming opposing players and goalkeepers. Also, both are contact sports, more or less. There are quite a few similarities (thats Why I think Hockey Fans should give handball (the European One) a Chance- it shares the Same basics)
Still, I am glad to live in a Soccer first Country. As great As playoffs are, I like the fight for championsship, european competition and relegation on the last matchday in simoultaneous matches better; also, the fact that there are international competitions to go with a Domestic cup is cool (granted, thats Not possible in North America- only 2 countries there)
Soccer is the Most simple, most complicated, Most addicting, Most annoying, most exciting, Most boring, most beautiul, most ugly, Most finesse, Most hard-fought, most euphoriant, Most crushing sport in the world, all at one time... Thats what makes it so great. I'm sure Soccer will gain popularity in North America, but as long as Kids in europe grow up with the game and Start playing it with 4 years, and barely do anything Else in their childhood (sadly, Video Games are Making their impact- I could see poorer countries catching up to the super powers in their respective sports in the next years due to that), the game will have its center in Europe.