Wow, thank you for playing it multiple times!
When the game was tested, it initially had one response per caller. However, I got the feedback that the callers are “too nice” and “too accepting” so I had to rewrite the script so there are two possible responses from the caller: one positive and one negative (ish) for each DJ advice. It was the final day before submission so I ended up randomising the answers. The succeeding caller responses were supposed to be based on your previous advice, but my brain wasn’t working anymore so I took the easy way out :P
As for the endings, they would differ if: you skipped all the songs (giving you the Silent endings) and if you contemplated in each song (giving you the Reflective endings). The advice you gave also affects the ending but you have to pick consistent answers. I’m writing more scripts for the endings based on the callers you encounter, too. I wanted to hide lots of Easter eggs for the proper, first version of the game :D