Free, relaxed fun, cheap and not yu-gi-oh. I used to play yu-gi-oh but then it got way too expensive(this was PG for me), but pokemon remains cheap. I did almost make NATS last year in yugioh though with cards from like 4 years ago. Marik owned everybody, 1 lousy turn away. Also for pokemon despite being cheap I feel it is more competitive than yugioh and there are more good/playable decks too.