I think I'm one of the option 4 candidates.
Until recently, when I started flying aircraft with the payload to carry a GPS, I'd never used one. So, line on a chart and cross-referencing it is too.
About the reliability thing, I'm sure that it is a damn sight more reliable than a lot of other, quainter, navaids and in VMC I can't beat it for telling me how lost I am. I'm unlikely to become an IFR person but if I were, the other 23 hours in the day when you're not using GPS may be the times it has problems ?
IO - I'm not "spreading an anti-GPS story", nor am I anti-GPS, merely trying to point out that 350 hours out of 8000 in a year isn't a big enough sample to convince me to rely totally on it - much the same as a lot of other people.