Why do so many MTG players end up getting into poker??

[excession]

MtG is very strong on adaptablility. You tend to play best of 3 matches vs 6-8 other players in a day long MtG tourney and as you each are playing decks of your own design you get very used to adapting from player to player real fast. You also have a similar situation in that the turn of one card can dramatically alter the position and you may need to then switch from offence to defence in an instant..You also needs 'balls of steel' to make certain decks work properly - I would expect that it's actually better training for NL holdem than, say, Limit holdem is..