I had good luck with SuSE and OpenSUSE running KDE 3, but KDE4 was a disaster. Right away, things failed, like being unable to write to an iPod 5 or below. As upgrades came along, things got worse--spurious console errors, UI elements not drawing, etc. The final straw was KDE4's "semantic search technology" which never worked on any machine I tried, and which I blame for rendering 12+ years of email totally unsearchable other than by find and grep in a terminal session (maybe Nepomuk was not it; maybe it was other lousy bit of software; the results were that all attempts to index mail died).
When my home Dell box died, I took is as a sign. I'd never liked Gnome, so after 15 years of Linux as my personal OS and longer as my work OS, I went back to Mac. There are things I miss about Linux, but with my Macs stuff just works. I certainly don't miss KDE. And my mail is once again searchable.
Polygraphs are one reason I left classified work for greener pastures. I believe they are nearly worthless, used just as much to harass as anything else.
In my last classified job, my employer hired a new security officer. After several months on the job she was sent for her polygraph. She returned the same day, the test unadministered because she had a heart problem. The problem was manageable, but it made it impossible for an "accurate" test. Despite this she remained in her job. With access to far more material than myself and others--sensitive material covering many programs--she was excused. Obviously the intelligence community doesn't believe in polygraphs either. I'm glad to be out of that world.