If I might make a suggestion, since you're close to being the same size and stature as me.
If you're riding solo with empty luggage, the main difference that between the solo and solo + luggage settings on preload is that the bike will effect a slightly faster rate of turn on the + luggage setting. This can be useful if you're an agressive rider and like to really scratch. A bit of weight in the luggage will bring the rear of the bike down a bit and slow the steering down again, so if you want a faster rate of turn solo + full luggage go to the rider + passenger preload setting.
For damping settings, I only ever use Comfort around town. It's good for cobbled streets and the expansion joints on bridges. I know some people use it for motorway riding but I find it makes the bike just too wallowy and I don't ride much on motorways, anyway.
Normal is good for twisty, bumpy roads which are my preferred routes.
Sport is best reserved for smooth, fast A roads. I find it's too hard for my favourite goat tracks.
HTH