I watch Disney too, which is kinda embarrassing, so I don't tell many people about it XD
I think Austin is an ESFP, who are the performers. He's definitely extroverted (the description of the first episode even said so). He lives in the moment, which is how I figured he was a sensor. He doesn't like hurting people's feelings, like in the episode where he had one ticket, and said yes to everyone who asked. And he is flexible and doesn't like scheduling things, so he's most likely a perciever.
I think Ally is an INFJ. Introverted because, even though she conquered her stage fright, she still doesn't give me that extroverted vibe. She doesn't start unnecessary conversations, etc. Intuitive because she has all those ideas, and thinks of the future, especially when she had stage fright. Feeling, because like Austin, she doesn't want anyone's feelings hurt. A good example of this is when Austin wrote a song himself, and she didn't want to hurt his feelings. And she's a definite judger, with the organization and being annoyed when Trish is late, etc.
Trish is a definite ESTP. She doesn't have a problem with all those jobs, and meeting new people so she's extroverted. Sensing because she's down to earth. Thinking because she freely insults people, especially Dez. Perceiving because she doesn't plan things out and she's always late to meetings.
I'm not too sure about Dez, but I think he's an ENFP. Extroverted because he doesn't think things through and he doesn't seem to mind social interaction, and it doesn't tire him out. Intuitive because he jumps from idea to idea, and his short story was enough for me to believe he was an iNtuitive. I chose feeling because he isn't logical, but I'm not sure. And perceiving because he's spontaneous and carefree.
When I watch anything, I can't help but think about MBTI... and I'm tired so sorry if some of these things weren't clear enough :bored: