I've always beem around machines, but I do sometimes lose track of time and place when playing certain games. So much so that moving from an EM to SS to DMD totally throws my judgement. The "zone" for me will mean constant playing of a SS and NOT playing a DMD for a while, or constant EM and NOT playing SS or DMD. You kinda lose focus.

Certain titles hold my attention longer - especailly Paragon.