that youre addicted t spaceflight at all when you see incetion and the frst thing to think about at the zeroG-scenes is the ISS...
When you think that NASA's Mission Control Centre is just naff because Orbiter looks way better than their graphics showing where the shuttle is.
When you go on vacation and pack an entire extra suitcase with Orbiter-related stuff. (laptop, several very large hard drives to contain your many Orbiter installs, a huge stack of printed flight manuals, and a life size model of the Probe to worship so no malfunctions occur during your flights.)
Don't forget the joystick and (just in case) a USB numpad.
...when you go on vacation and secretly want to leave to play orbiter
when you download Kerbal Space Program for Windows and think: It's KSC-WIN, not KSP-win! :facts: because you think at the typical ORL KSC-WIN-flight...
GUILTY