You don't want to know how many cards I have. I think I have four or five Energy Fields and I certainly have a few extra Balances that aren't in my deck. Wrath of God isn't that expensive, is it? I certainly have plenty of those. I put Kird Apes into my red/green decks and I have the Maze of Ith in two different decks because I have two copies. I think I have four Demonic Tutors and two Sinkholes (mostly in decks right now, of course). I even had a foil Serra Avatar but traded it for some hideously powerful old cards because I don't care about foil cards. I still have three or four Serra Avatars, though.

Yes. Of course, my white Angel deck does pretty well against most decks. My blue/white Millstone deck crushes nearly everything.

They are fun, but green is too easy to shut down, in my opinion. Some of the newer cards have been making it MUCH better, but green tends to be slow to start.