Okay, so 'mlp x human' stuff can be really hit or miss for me. I tend to steer clear of the super cliché portal fantasy stuff where a guy just ends up in Equestria and becomes some ultra-powerful alicorn overnight. The best ones I've found are usually the ones that treat the human side with some serious thought. A standout for me is 'The Maretian'—it’s a crossover with 'The Martian', and it’s way more about survival and science than just ponies meeting a human. It’s surprisingly grounded. There’ s also this older one, 'Arrow 18', that focuses on a human pilot who crash-lands and has to navigate the cultural and technological divide. It feels less like a power fantasy and more like an actual story.
I’ve seen a lot of recommendations for 'Anthropology' and 'Past Sins', but they go pretty deep into dark territory, which isn’t for everyone. If you want something lighter and funnier, 'Background Pony' has some fantastic human interactions woven into its core mystery, though it’s not strictly a human-focused fic. Honestly, the tag is flooded, so your best bet is to sort by favorites or reviews on Fimfiction and be ready to bounce if the first chapter feels too self-indulgent. Some authors get the character voices of the Mane Six just right, which makes all the difference.