I'm fairly critical, so there's not too many on my list, but the biggest one is that I liked Quest 64 (somehow) when I was younger.
I also love La Mulana 1&2, along with Deadly Premonition, though those are more "cult hits" aka critical failures that 'widely disliked'. But, I'd definitely hesitate to recommend any of them to someone unless I thought they'd be into it.
It's always held a place in my heart because it's kinda like Oblivion: Janky as fuck, poorly designed, and just not at all what was promised, but still possessed of an ineffable charm that kept me playing it
Also the flying cars mod really gives it some staying power now