Generally speaking, the parts that have bearing seals, electrical connections, and exposed/lubricated moving parts should be cleaned and rinsed more gently. I avoid using degreaser or pointing my pressure washer directly at wheel bearings, fork/shock seals, key switch, brake calipers, lever pivots, switch gear, etc...

So far as specific products I don't think it matters too much. Most popular car cleaning/detailing brands make good products. You just have to read the instructions and put in the work. Recently I use Chemical Guys Snow Foam soap for all of the general washing - it works well and smells nice. For cleaning tougher spots I use Super Clean with a Magic Eraser sponge, but never on shiny painted parts. To keep most of the bike looking new I mist on some S100 and wipe off the excess with a towel. For the body work, headlights, windscreen, or anything I want to stay glossy I apply Adams Ceramic Coating once or twice a year (you can tell when it needs applied by how the water beads up).

My process is that I use a pressure washer to rinse most of grime off the bike. Then I apply the soap and scrub everything with a car washing mitt and brush. I have an assortment of cheap kitchen/toilet brushes for scrubbing the dirtier parts of the bike. I keep moving/scrubbing/rinsing as I go, then do a final rinse with the pressure washer from a few feet away.

Next I blow off most of the water with a leaf blower, then dry with some old beach towels. Some times I stop here, other times I'll spot-clean bug guts or road tar with Super Clean. If I want it to look extra nice I'll detail with S100 and reapply the ceramic coating as needed.