Funny enough, that's one of the reasons why I ended up watching it.
It's usually about the mane 6 (all the ones in the image apart from the small dragon [Spike] and the white Alicorn [Celestia]) and friendship issues. Each one of them represents an element in the elements of harmony. Near the end, they would learn a lesson about the situation (also being resolved) for that episode and say it out for Spike to write down it and to be sent to Princess Celestia. Of course, there's going to be a great story line to bring it to the viewer the most awesome way possible. The newer seasons do have a twist in things, like a lot of adventure, so you would have to often think about the episode to get the message rather than it being said out at the end like the older seasons.
Within the show, there are quite a lot of catchy songs, season 3 is no exception.
The show does get a few animation errors here and there, though one turned out to be a good thing and the second was within one frame, which shown something hilarious.
The humor is great as well, like the facial expressions can get to you.
There are some references and a lot of forth-wall breaking (oh Pinkie Pie).
There's a crazy amount of stuff that I haven't mentioned that makes the show great.
If you do want to watch it at some point, there's a lot of episodes on the DailyMotion, though they aren't really HD. I personally check YouTube first for any videos that would show it in HD or close enough to it. Also, when a new episode does come out, a few hours later after show time, I go on YouTube and watch it (the HD ones are usually up at the time) before they get removed like many others have earlier on. From what I've heard, you can watch it live if that's something you would prefer.