You check Dick Eastman’s blog before reading emails from the family.
You’re familiar with most of the 5,120,000 genealogy web sites found by Google.
When you hear the phrase “an inconvenient truth” you think of a relative's dubious paternity.
You spend more on genetic genealogy than electricity.
Your doctor has diagnosed "citation fixation", losing sleep wondering if you cited the source correctly.UPDATE
Randy Seaver, who certainly recognizes the genealogy obsessed when he sees them, has a much more extensive list worth browsing at The Geneaholic. Maybe I should add "operates three (or more) genealogy blogs" as a sixth sign.