I've put a lot of thinking into what I'm going to tell you all next. In fact, I've analyzed the facts with numbers ('cause I'm secretly a nerd-- was a science major at one point, after all!).
Instead of explaining in huge blocks of text about how I feel about each piece I'm working on, I'll show you:

Everything is rated from either a 1 (low) to 5 (high).
Potential -- Do I see this becoming something great that people will finish reading and go, "Wow! That was fantastic!"? Or is it something that, to me, seems pointless and not worth my time?
Muse -- What is my average level of inspiration? When I designate time to write, do I sit down with my laptop and go, "Okay... so um... uh... so what's going to happen? ...err... I... don't know..?" Or can I cruise through a chapter easily?
End in sight? -- Can I visualize an ending? Do I see this series coming to a satisfying close? Or am I unsure and kind of dawdling until I can stumbling upon an ending?
Reader interest -- Judging by messages, reviews and ratings, how is each piece accepted? Are people still interested? Or have I gotten little feedback lately?
Writer interest -- Do I groan and sigh whenever the thought of updating a particular piece comes to mind? Is the update something that I can write with relative ease because I find the writing exciting and worthwhile?
The three that are the lowest (Chronicles of Narnia: The Missing Season, A Digimon Tale and Meaning of Devotion) I've made the decision to discontinue.
CoN: MS was already on a hiatus. I think everyone saw this coming. My interest just faded, and I obviously never knew where I was going with this. I might as well officially discontinue this.
DT was made on a whim-- I do this a lot, which is awful, but I don't feel the need to write Matt an entire series anymore. I have no idea what to write either, other than small, mushy things between Matt and the reader. While cute, I prefer epic story lines.
MoD-- I put a lot of thought into this one. I was so excited to make this a real life wwyff, but it just didn't work out. I went back and read through what I had so far, discovering that it really isn't that interesting. Besides, I ran into complications. It's absolutely impossible to chronicle one's college experience without some important definition of identity (political stance, race, major, etc.), which I couldn't do because MoD is a reader insert.
I sincerely apologize for any disappointment this decision may have caused. However, I don't think it's fair for me to force myself to write something I no longer have any interest in, and it's certainly unfair to readers for these delayed updates with a possible lack of quality as a result of my disinterest.
If anyone is interested in finishing the remainder of the above three stories, please feel free to message me. We'll discuss the possibility. ^_^
I don't know how many people are interested, but I'm beginning a Seto Kaiba fic (I had three dreams about him in the past week-- it's fate, I swear) and might be extending my Howl two-shot. I'll also be working on one-shots and possibly drabbles, depending on what my contest winners want.
Thanks for listening to my rambling. Kaiba's fic should be up soon! Comments, suggestions and questions are welcome!
Always,
Penguiduck