[@Bishop]
If you really and truly want him to suppress his old life or have amnesia or something, I suppose you could do that, but it would kind of defeat the purpose of the "isekai" or "person from our world in a new world" genre. If you DID do that, depending on how much of his human self you really "suppressed" he'd either lose his mind entirely and become just like the random monsters, in which case his behavior would solely be based on instinctual or biological imperatives until he gained more intelligence/awareness, OR he would be like a completely blank slate human--he wouldn't know his own name or where he came from, just the "general" knowledge that a person with certain kinds of amnesia retains. But because so much stuff is tied to memory he'd be losing some distinct advantages.

I'm not really sure what you're trying to get at with the different actions aside from general experimentation, and I'd rather you not run your own random encounter combat scenarios because of some behind-the-scenes stuff I do for them. If you have questions about stuff you'd like to know the answer to, go ahead and post them, but I may not give direct answers to everything. The whole point of this RP is encouraging players to be creative, to experiment, and to explore.