I'd read it every now and again.

If it were very funny I'd read it a lot, I like to have a bit of comedy in my day.

In regards to gaining a large degree of return fans to read it over and over, you need to write something that has a niche, it needs to be unique in what you do with it and written well. These kinds of things closely resemble P.O.V novels and books. It needs to capture the readers imagination and make them keep coming back for more without it ever getting old and stale. That means increasing it's scale more and more over time with no foreseeable limit. Things like these tend to be quite high maintenance and could see you sitting at your computer for hours on end some days just trying to come up with something to add to keep some kind of time-frame with each post.

Usefull things to look up for this kind of thing would be website that give tips to would-be authors. What it looks like you'd be intending is as I said, very close to a P.O.V novel, so tips for writing a novel would be quite relevant to you.

Certain things I must point out to you though:
1 - Using any form of popular pop-culture quotation is a no-no when writing in character. The world of Eorzea wouldn't contain the fictional books, fables and movies our world has, so it wouldn't make a lot of sense to put something in from them
2 - Sometimes owners of the original creation for which you are basing your idea from may not like you using their material, so possibly send an e-mail to Square Enix asking if it would be ok to do this. And who knows, they may even provide you with help to develop your creation if they say yes.
3 - Try to avoid putting your character into a situation which could result in the next blog post being slow and lacking detail. Things like this often lead to writers block as you try to spice up something you've gotten your character stuck in.
4 - Be mindfull of how many characters you add to interact with your own. Too little could reduce the amount of possible plotlines you could create. Too much and it coud get confusing for yourself and the reader as your character juggles from one person to another.

Finally over the years I've attempted to write a good many stories and novels. Many of them crash and burn in their early stages, some of them make it into mid-plot or later chapters before I finally give up on them. It's very difficult to keep going with something and always come up with fresh new ideas to maintain it's momentum and though I'd like to think I'm not lacking in the imagination department, I often end up coming to a grinding halt as I become uncertain of which direction I want the story to take.

I hope this input helps you, and don't be put off if I make this sound like a difficult thing to do. For some people it comes naturally and they're able to do it with ease, if you're one of those people then I say go at it with all your heart and soul and see where it goes.