I collect Dragons and currently have all Dragons printed in Magic except Zodiac Dragon.
I play mainly EDH and have the C16 decks, a Kaalia deck, a Kruphix deck, a Rhys the Redeemed Token Deck, and a Surrak Dragon Tribal deck.
My first cards were the Seventh Edition starter pack, but I didn't start really playing/collecting until around Ravnica (the original one).
I did stop playing for a little while from New Phyrexia until Shadows of Innistrad so any cards from the intervening time are appreciated.
I enjoy non-basic lands, and the full-art basic lands of all varieties (from the un-sets and from Zendikar)
I'm mainly doing this since I recently finished organizing all of my old cards, and want a chance to share them with others.