1- Don't be a 1-liner shitposter
even if there is nothing much to say , just type some bullshit to fill in your actual words.
A post is not subject to have a bigger size or length in order to become constructive or merit-worthy, but the content it stats makes it one. Dragging your answer purposely from only a sentence to three or four would only make it look worse if you don't have any extra points to add into it.
2- Don't post China great wall text
nobody has got the time nor the mood to read 30 lines for the same person unless it was Satoshi explaining how to get free bitcoin.
What I said in answering the first quote applies for this as well. The size or length of a post depends on the nature of the topic being discussed, and as long as your post makes some sense and is properly constructed, no matter how large it is but it would still get the attention it deserves.
3- stick to simple format
don't use capital / bold / kinder-garden like colors / weird ICO symbols on your tittle.
There is always a way to use something, otherwise it would have never been created at the first place. Using these attributes/properties would only make your post look ugly if you use them in the wrong manner. Otherwise, there is no harm in using them if you know what you are doing.
About the title thing, you are right. Using anything extra in the title doesn't really make it look better or attract readers towards it. The text in the title is what the genuine readers see before opening a thread.