I agree, and Party Pooped became my favorite episode ever partly because of that, because it showed Pinkie being in a tough spot and not being her usual self for the first time ever since Party Of One (when she wanted to smile and couldn't thus ended up making that "horizontal mouth" face, and when she lost it making that mad hysterical laugh out of anxiety, and when she had derped eyes - the SAME eyes as in Party Of One!), her exterior broke, and that moment hitted in her character depth so much, I loved it!I still believe that she's fairly strong, though. Of course nopony is invincible, and she can fall into despair like anypony can under certain circumstances, but I mean that she while she had SO many occasions to feel sad, to loose hope, or to be angry, she always smiles at whatever is happening, she punches every ordeal in the face with her positivity, and most often than not while all the others are in low spirits, she's always here to cheer everypony up or ease the situation. She instills positivity in others, while actually "absorbing" their negativity, that's why I said it takes effort everyday. Not only the effort to actually smile in the face of negative things while it would be way easier to let it get to you, but also to carry the weight of others' negativity and to progressively "neutralize" it within herself, countering it with positivity. Some may only see her like a positive pony, but she's actually making effort to help everypony, and to actually bring smiles. She's a warrior, fighting negativity on a daily basisI can tell... I'm the same ^^ That's why I could understand all that so well. I just know how all that feels, and how it takes effort, and why suddenly, for no reason, while hearing out another, you start feeling painful emotions inside of you... it's because it was kind of "transferred" from that person to you, or at least a part of it. And then you know you've got to fight it and keep smiling... ^^ And yeah it's not that easy. Pinkie has got WAY more than meets the eye.Although of course, everyone is free to interpret her character in any way they want XD