To be quite honest, having ever never used the Pentax before - I found the manual easy to understand and was up and running in no time.
I use the hyperprogram a lot as it allows me to adjust either shutterspeed or aperture (via front and back wheels) according to my needs while keeping the same exposure - a very nice function
Living in SA we have very bright sunlight on ocean and beach and generally can see the green led's quite easily - I also use the top lcd a lot for quick ref.
I use AV most of the time as each lens has its aperture best performance sweet spot and I
set it to that. The sweet spot (general rule of thumb) is normally 2 stops down from wide open - with a really good prime as little as 1 stop
cheers
D