Ehh... Days ago I've promised myself to not take part in such discussions, but here we go. You see, both of you have a problem - the lack of balance between readability and style. While Sombra's posts look very aesthetic and cool in terms of design, I should admit that it's hard to read without focusing in or Ctrl+C/Ctrl+Ving the text somewhere else. Darkwind's posts are easy to read, but they look trashy in terms of aesthetics and design. Of course, it's all in my humble opinion, but I feel that a lot of people might agree with me.
So, the problem of OP is mixing the terms of design and readability, they are different things, but they both are important. If your posts have trashy design, nobody will even care to take a look at them, if your posts are especially cool in terms of design but absolutely hard to read, they will catch someone's eye, but there is a chance that the reader will get tired and stop reading it at all. What is important is keeping the balance between these two sides.
Sadly the OP is so fixed on the topic of "make it as easy to read as possible", so he forgot that all them big fonts and bright colors might actually make your post look ugly af, but still easy to read. Btw, there is a tutorial on forum posts styling from Protege: check it out.
Also, I guess, that there is a thing that might make people angry: your anti-examples literally look like public shaming and it's not a good thing. Moreover, there is a special, moderated section on forums for tutorials here. While it's obvious, that originally you didn't want to harm or offend anyone, you occasionally did it.
EDIT: Speaking about anti-examples and design, your example #2 literally uses too big fonts in unjustified places as well as no marking at all. It might be fixed by simple usage of horizontal lines -
Code:
[hr]
or colored horizontal lines [hrc], which were literally created for this purpose - to separate one part of the message from another
