"What I like is surely what everyone likes..."

In terms of structure and content of posts, I generally agree with what you've written; however, with regards to presentation, we all have personal preferences, which can be quite different.

harangzsolt33 made specific reference^[#11151208] to "font size" to "70-character limit". In my response^[#11151212] I made general reference to Display Settings and included specific information about those two items.

It would be over a decade since I set up my preferences, so I don't really recall exactly what I didn't like. Presumably, I was OK with my browser settings, so I've made no change to <code> block font sizes; I generally use a large screen, so I've increased the default 70-character limit via the Code Wrap Length setting; and, I clearly didn't like the rendering of some specific <tt> content, as my CSS includes:

tt.inlinecode > font[size="-1"] {
    font-family:       monospace;
    font-size:         0.917em;
}
[download]

The point being that these are my preferences and do not affect any other user.

harangzsolt33 has made use of <font> tags and bgcolor attributes to get the rendering he wants and doesn't seem to care that this does affect all other users.