I think this is interesting. It's not really monotone, but it is just a tiny bit "atypical." (it comes of just as your style, not necessarily a mental issue or anything)
It's fine as is, but if you're eager to perfect it, I do have some comments on it. The inflection (to me) seemed arbitrary, not based on any particular system. When nerotypicals speak, they're inflecting their voice using a set pattern (a pattern that we don't pick up on as quickly as neurotyps do I take it). Maybe you'd enjoying doing a little research on intonation and applied it to your conversations (just go on youtube, and write down the scripts, and then note pauses, pitch change, and emphasis.
Comments:
"Hello, (pause at all commas btw, as if your waiting for someone to turn and look at you, or wave back)
I'm here to talk about:
-sonic four ep 1 (intonation goes upwards to indicate that this is not the only thing you'll be talking about, ie, there are multiple things in the list... say it as though your asking a question)
(small pause) AND (Big emphasis then a short pause)
-what I think about it so far. (the inflection ends on a resolving note here, to indicate that this is the last item of the list.)
I think that if you actively study it, you will get it figured out just fine. BTW, sometimes when I'm talking... I feel so superficial about how I'm using my voice that I don't even want to continue, but I just grin and act like I'm having a grand, old time with it (and usually I am) and everybody digs it. Sometimes I even do an impression of a British professor for parts of my conversations.
It might help to script things out and practice them at first, and then once you start getting it, slip cool pauses and inflections into your linguistics naturally.
Oh, also, btw, when you said "definately looks like something I would have a lot of fun playing." that was pretty much spot on correctly inflected, as were other parts. at 0:45-1:00 things are a little too quiet and low in pitch (when you go too low in pitch, inflection becomes impossible so you need to reset your pitch to a higher note). You'll know when this is happening when talking becomes less comfortable.
Hope this helps.