Partial Answer for time saving Sake.
Seeing as the whole actual riddle could be seen as slightly difficult to read with the subscript and misplaced capitals, I have done us the deed of making it nice and fresh.
My friend, your luck has turned.
I've made this riddle and it is the best, and "soon it should be solved.
If it is not, then a quiet mind might let seeds be sown, within which ideas can grow.
In essence: at the end, in one small day, secretly, our view regarding the solution can be told.
Are you festooning the place with streamers already
this is a quirky, fun, exciting riddle.
By my count, the few gifted who can solve are > tolerable, but the text, inc. Punct. Marks, is splintered and somehow in reverse.
Many may fail, but the one, the discerning will take his time; will rethink what one word may or may not be requested.
If you are able, call a friend, lose the lack of excitement, include the right answer, and find the word that solves the riddle at once. Yes ;>
My original workings out. (Didn't take much don't give me too much credit)
The Superscript letters spell out:
"My First on its own really loves to inquire. My next in an auto will blacken in fire"
Due to other answers by: (@Sconibulus, @Yandrakus and @dcfyj) I came to gather the 6 so far.
My first on its own really loves to inquire.
My next in an auto will blacken in fire
MY THIRD THE QUINTESSENCE THE CROWN OF PERFECTION BUT SPLIT DOWN THE CENTRE IN TWO EQUAL SECTIONS
My fourth is the time since the day you were sired
My fifth marks the time that a rocket is fired
My last's often down when you start in the middle. My whole,in reverse,is how you found this riddle>
Now for my ideas for what they mean so far!
"My first on its own really loves to inquire."
I believe this to be the letter Y, a common abbreviation in text talk and speech sound, of the word 'why' which is to question, to inquire.
For the third point, it mentions a crown, split down the middle.... I believe this has to do with the look of a Capital letter, seeing as it was derived from a sentence created from capitals.
All the current letters that can be cut in half equally when capitalised are as follows, in order:
A H I M O T U V W X Y - as well as the numbers
0, though i feel we can exclude numbers.