[njharman]

If you don't know what a MMO is then you need to back up and ask that question first.

Eve is an single "shard" MMO with a starship piloting theme. Similar in ways to Elite http://en.wikipedia.org/wiki/Elite_(video_game) The economy (and related such as production, resource ownership, politics, warfare) are, to an extent not found in most MMOS, player driven. That is what sets Eve apart.

People are a varied lot and thus like it for varied reasons. There are several ways to enjoy game.