Interesting. I find the action parts of books written in present tense the most jarring. In fact, so jarring that I cannot stay immersed in those books, so I don't read them. Of course I know that I am more of an exception than the rule, and most people will read books in any person or tense, as long as the book is good.
My daughter, who is 12 and closer to YA than I am, said she doesn't care if it is 1st or 3rd, but also has preference for past, although not as strong as mine.
I think that goes back to the "if written well" caveat. Keep in mind that everything which follows is a completely unqualified opinion from a totally unpublished writer, but past tense is a more natural narrative mode. It appeals to our instincts as creatures who are wired to learn from stories. Present tense, though, is a much more immediate storytelling mode which
can be more effective at sucking the reader into the moment. Thus, when you combine it with first person, where the reader is more or less forced to live in the MC's headspace, the reader is being asked on an emotional level to live
right now as
this person.
Keep in mind, I love first person, too. If all of the ideas behind a story line up so that I can allow a character to tell the story for me and expose the full plot and theme without ever breaking away from their eyes, then it's the flying arthropod's flexible lower appendages. Similarly, with present tense, I'm going in with the knowledge that I'm going to have to severely edit for pacing in later drafts because I know I'm going to screw it up even more so than I would with past tense. If you ask me, it's the most difficult tense paired with the second-most difficult voice to pull off well. There's undoubtedly people who find that natural. I don't, and I'd be willing to hypothesize that those who do (and do so well) are an uncommon breed. So, if you
can nail it, go for it, but make sure you're doing it for the right reasons and not just because you can.
Wrapping all of that back into context with the OP. changing the tense of a complete WIP isn't something I'd trust to the judgement of a fifteen-year-old. Polish it, beta it, maybe even query it, and if somebody can make a compelling argument about why you should rewrite the entire thing to accommodate a particular taste, that's when you worry about it. Don't fix it until it's a problem.