So, I was thinking: Twilight has been a alicorn for a while now, correct? I'm just going to bust it out now; she's going to be living a very miserable life.
Why do I say that, you ask? Think about it. Just like Celestia and Luna, she's going to live forever (or a very long time at least) and she's going to watch her friends grow up, grow old, and die; yet she will still be alive and well.
Now I know what you're thinking at this point; Xan, that's terrible to think of. It is, it really is, but it's true. I wonder, did Celestia and/or Luna have any close friends growing up, or did they know at a young age that it was their fate to watch the ponies of Equestira grow and change and die? To watch the world grow and change, never to be the same as it once was.
When it gets late, I think of this stuff all the time; the bad side of everything.
Of course Twilight could always make new friends, but those will grow up and pass away as well in time(Hopefully due to old age and not by another incident).
These are my thoughts, leave me a comment on what you all think.