I pick Vithian Stinger and Blood Cultist very high just for decks with all that 1-toughness stuff.  Jund Charm is very difficult to pass, and Infest is, too, although being double black and a sorcery, its not nearly as good.

After going 7-1-1 on day 1 of the GP, my record in Shards limited wearing my Hard Rock Rome shirt is now 11-1-2, in 2 events.  I think the format is all about what you wear.

Seriously, though, Ive done very well with red-based decks in this format, in both sealed and draft, including Naya, Jund, Grixus, and 4 & 5-color,

Mike

Simple - casual is playing just for the fun of playing. You may have prizes, but thats not why youre playing.

And note that I said playing for the fun...of playing. Maybe many tourney peoples find it fun to win the prize or whatever. So they play for fun, but its not the same thing.

Thats my voice anyway.