Okay, I've just watched the first several episodes and all I have to say is...
HOW DID I NOT KNOW ABOUT THIS UNTIL SEVERAL DAYS AGO?!?!
Seriously, it's been quite a while since I've ever watched a cartoon that had humor I could laugh at. I think what I really like though is that the creators made it enjoyable even to those who have never liked the MLP series.
This is coming from a guy who loves to play Mature rated shooters like "Dead Space" or "Call of Duty" and watch R rated horror and action films. I can honestly say that I feel absolutely no shame at all about watching a series that is originally intended for a very young girl audience.
Short version, I think I have become a "Brony".
I'll keep watching so I can determine who my favorite characters are.