What I can't stand is when someone "name drops" a company they previously worked at. Such as, "...back when I worked at <insert Xxxsoft>" or "At <so and so place> we did things differently..."

We get it, your résumé is impressive. But it especially peeves me when they've been working at their current job for over a year and still mentions their old jobs.

1. I also worked at <XXXX-place> and it wasn't all that impressive.
2. If it was SO great, why aren't YOU still working there?