Thanks very much, Laurie! That's very flattering. And I TOTALLY agree with what you said:
"... tweak a bit for our own differences, in climates, light and watering style. Picking soil for the plants needs is a must, ..."
Knowing what kinds of soil different plants need is the most important thing. Not knowing that myself, I tend to start with something generic, and try to make it cheaper but still good for the plant.
When I read about potting mixes that many people do use successfully, my eyes bug out and I wonder "How do they DO that? They must manage to NOT over-water!" I've made some progress in the direction of over-watering LESS over several years, but it is still beyond me.
For example, some people put compost into potting mixes. Even indoors! And have happy plants. I would expect it to first drown my roots, then attract fungus gnats, then pack down even tighter. But other people have had no problems.
>> "our own differences, in climates, light and watering style. "
Just as every plant and climate is different, every gardener is different. What works well for one is a pain in the butt for another, and unneeded by a third. I think the best thing that websites can do is to give people a variety of ideas like puzzle pieces, to fit together with their plants, circumstances and style, to make the overall picture they are working towards.
My own preference is to start with the "WHYS" and then speculate and experiment with Rube Goldberg ideas. Like a science project, I guess.
Others would rather just try one simple method that is probably adequate, and then not worry about it further until there's a problem. They probably have more flowers, and I have more gadgets, but we're both happy.
Now I try to give a short answer up front, before I dive into the parts that fascinate me. I really appreciate it when someone enjoys the blah-blah-blah-blah parts!