Lots of interviews, no job offers (hourly minimum wage jobs). Trying to analyze my interview habits so I can see what I'm doing wrong.

I've had 8 interviews this past May and June. I haven't landed a single one. I'm trying to figure out the reason I haven't been landing any of them.

My strengths:

• I'm friendly, personable, no red flags (at least any I'm aware of). Always smile and eye contact, firm handshake if they offer one. I naturally mimic the interviewer's level of formality. I only talk using positive language and never badmouth past employers.
• I dress professionally. Dress shoes, dress pants, a tucked in dress shirt and my hair tied back. I come prepared with my resume in a clear plastic folder.
  
• I have experience in everything I apply for.
  
• I have very good availability (open availability except for one day)
  
• I'm willing to stay until I graduate university and possibly after
• I answer using the STAR method.
  
• I do solid research on the company before the interview.
  
• I ask questions when they ask if I have any questions.
  

My weaknesses:

• I'm too professional during interviews and I guess I can see it coming off as cold, and not genuine. I talk as if I'm giving a presentation and I talk with my hands.
  
• But the moment I realized this, I tried to be more myself during the next interview, which felt right, but when the interviewer was escorting me out:
  

INTERVIEWER: So why did you leave your last job?
ME: Because the new school year would be starting and I had to move to the dorms, but this year I'm going to live at home.
INTERVIEWER: "You didn't like living on campus?"
ME: "Well right now I just need money."

I cringe at how I said that, but I answered properly during the actual interview when they asked "why do you want to work here?"

TL;DR of this bullet point: I felt too comfortable when I tried to be myself.

• I say "fluff" to buy time while I'm thinking. For example:

INTERVIEWER: Tell me a time you dealt a dissatisfied customer.
ME: At (past fast food job) there were a lot of times when customers would be dissatisfied, which is just the nature of working in a fast-paced, high intensity atmosphere, but we always strive to do our best to handle complaints and keep the customer happy. One example is when... (real answer)

• I do directly answer the question but I can ramble at times. Often I don't know when to stop talking so my last sentence is, "and that is how I (repeats the question)" For example:

INTERVIEWER: What does customer service mean to you?
ME: Customer service means (answer answer, ramble and answer) and that is what customer service means to me.

• I will go back to school in September BUT I tell them I plan on keeping the job until I graduate!

I'm sure there's much worse interviewees than me. It's getting frustrating, I don't know why I need career-level interviewing skills for a minimum wage job but I'm trying to do something about it. So what's the biggest issue here? And how do I work on it? If any of the strengths are actually hurting more than helping, please let me know as well.

Sorry for the wall of text and thank you for your feedback Reddit!

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