Spawning in a new world for the first time
Punching your first block
Getting your first tool
Building your first house
Getting blown up by a creeper
Getting killed by an Enderman
Finding diamonds 
Griefing somebody's world
:James:
Marveling at your creation
Loosing your house
Dying with all of your stuff 

And I can't even begin to describe multiplayer
Punching your first block
Getting your first tool
Building your first house
Getting blown up by a creeper
Getting killed by an Enderman
Finding diamonds 
Griefing somebody's world
:James:
Marveling at your creation
Loosing your house
Dying with all of your stuff 

And I can't even begin to describe multiplayer

and it was legit fun