Earliest version you played on.

Be honest, it isn't a competition, there isn't a winner,

I want to know what the earliest version of minecraft you played on,
What things did you like about that version? and what do you miss about it?

for me it was Beta 1.2, I first got the game back then, and I can still mentally picture my first base, lost to a hdd failure, but a giant dirt castle was impressive for me.

I miss the old door and chest sounds, the simple clack of a door opening is still one of those sounds that make me get all nostalgic when I hear it.