In Frankenstein, what specific details show what kind of student Victor is?
One detail that shows the kind of student that Victor is comes from Victor himself. He describes how he was so hungry to learn at the university and how sometimes the teachings of his professors were of no interest to him because Victor was always ahead of them in his readings, but also because Victor had a penchant for reading discarded literature that his teachers would have disagreed with.
Yet, Victor admits to his hunger for learning when he says on Chapter 3
I read and studied the wild fancies of these writers with delight; they appeared to me treasures known to few beside myself. I have described myself as always having been imbued with a fervent longing to penetrate the secrets of nature. In spite of the intense labour and wonderful discoveries of modern philosophers, I always came from my studies discontented and unsatisfied. Sir Isaac Newton is said to have avowed that he felt like a child picking up shells beside the great and unexplored ocean of truth. Those of his successors in each branch of natural philosophy with whom I was acquainted appeared, even to my boy's apprehensions, as tyros engaged in the same pursuit.