Latest "diary" -- 15 systems surrounding HR 4734, an excellent Rocket Tea source, 2050/T buy, but at an outpost -- Keyes City -- surrounded by 31 FCs, so you can't bring the big buckets in to scoop up the bestest-buy goods. I parked J'S RESOLUTION in a nearby Anarchy system to avoid the parking crunch and lessen SC time when hauling 188 T of Tritium in my Python. While running the juice back and forth I took time out to explore the nearby surrounds, all within about 25LY of my base.
Out of those 15 systems, only 4 had planets, but the planetary systems I found were respectable enough. And again there was a selection filter in place that could have biased me against finding more planetary systems -- I only explored systems I had not yet visited (better chance of good UC rewards that way) and most of which did not have gov'ts (less chance of getting zero in UC payout), so that skipped a lot of systems with planets that I had already visited and/or which have governments. If those were put in the survey mix my percentage for planetary systems would have gone way up.
Heading for the black now, unsettled regions, where I can survey without bias -- all star types, all systems, regardless of gov't or lack thereof.