Capitalisation conventions

[乳头的早餐谷物]

This is a question about how to capitalise words in titles. I'm okay with either capitalising every word or just using normal sentence case—for headings, I much prefer the latter, but for titles, that can look kind of wanky since I'm not French. However. I am thoroughly against capitalising some words but not others. I see no good reason for it. Capitalising every word in the title makes sense because it's a proper noun. When you leave the prepositions and such as lowercase, you suggest they're not part of the title.

[scythe]

Sentence case is the only way to fly.

[29403]

2nd one.

[otters~1]

The second is the AP style we use in journalism, I believe, though it varies with the situation. Song titles need to be completely capitalized, though.

[Kablizzy]

The second is the AP style we use in journalism, I believe, though it varies with the situation. Song titles need to be completely capitalized, though.

.

[SlappyMcGee]

In French Canada, nothing is capitalized after the first word and proper names.

ex:

Harry Potter et le roche qui donne les choses qui est bonne pour societe et aussi Ron etais la.

[Tanner]

Ceci n'est pas une tarte forum.

[Skyling]

I personally prefer the look of the second one, although which words to capitalise or not capitalise can get extremely confusing, so I can really settle for all three. I suppose it would depend on the artist's preference.

[t̷s͢uk̕a͡t͜ư]

I hold that #2 is correct, but that #3 is most sensible.

[EdoI]

In French Canada, nothing is capitalized after the first word and proper names.

ex:

Harry Potter et le roche qui donne les choses qui est bonne pour societe et aussi Ron etais la.

Same here, but I prefer the second option when it comes to English.

[乳头的早餐谷物]

Okay, so guys who went for #2: how do you defend your position? I imagine it's just a matter of aesthetics, which I can appreciate as being the most important thing, but is there any other logical or semantic argument for that style?

[t̷s͢uk̕a͡t͜ư]

is there any other logical or semantic argument for that style?

None whatsoever.
For some reason, some self-proclaimed authorities on the English language decided that some arbitrary words are less important than arbitrary others.
I just think it's true because that's the accepted standard. Although qualifications for being in a position to accept a standard for the use of a language is its own senseless subject.