I'm not sure that's too accurate a quiz...
1. A. But I own 80% of all the cards (counting only the rares since the others are so easy to collect), never having spent more than this in a single go. Hell, I EARNED money building my collection! I didn't pay for most of it.
2. What comes before A? I play at home about every other night, people come to my place to play, not the other way 'round. That should probably count as an E.
3. None of the options are relevant, but I'd go with A for scoring as I tend to not think about Magic unless the cards are infront of me.
4. Don't know. Haven't met any new ones (offline that is) in years, I have to train them myself. When I meet my friends we usually talk about our days, movies, women, anime, etc, even while we're playing. I'll score that an A for being off topic of the game.
5. One card and one card only: I play Green because I got a Gaea's Liege in my first starter box of Unlimited. I guess that's a B, even though my collection is black heavy in the top cards.
Total: 9 (10 if you give me the E on #2). Yet I've been playing since before Revised came out, I'm a fanatical collector, I play for about an hour a day, and I've corrupted over 30 new players (five since this September)...
Most telling reason I should have scored 20: Just today I went to my boss' wedding reception. I wore (and still have on as I write this) one of the black MTG polo's with the embroidered mana symbols on the left breast. No joke.