No exploits needed. If you need exploits, you need practice
Tastes differ though, and I can definitely see it's not for everyone. But it's one of my all-time favorite games and I'm pretty sure nothing will really top the first experience I had with it. It's the combination of several things, and it's hard to put into words exactly what I love so much about it. But the overall atmosphere of the game - the wondering of what the hell this place is and what's going on, the sense of hopelesness and loneliness, combined with the difficult nature of the game, makes it awesome to me. I love the artistic side of the game, the visuals and the music and how effectively certain things are used.
And on the more technical side, the gameplay concepts are brilliant. It does difficulty in an almost perfect way. If you just rush in, you will die. The game is supposed to frustrate you, but award patience and practice. When you finally get the hang of it, you feel great. And the game offers you other solutions - flesh out your character and come back when you're more powerful, or summon help. Which leads me to another part of the game: the online interactivity and the factions. Both of these tie in so well with both the atmosphere of the game, the story and the gameplay itself. The fact that you can't really team up with a friend and co-op the entire game, but rather have to rely on random strangers occasionally helping you (or being such a random stranger yourself) lends even more to how lonely and vulnerable you feel. Especially since you always risk being invaded by dark spirits when trying to summon help.
The fact that the game never tells you where to go and what to do (well, barely). It's up to you to explore and find out. And the story isn't shoved in your face. You can ignore it, or dive deep into it (it's so deep that there are hours upon hours of discussion and theorizing on the internet).
And the level design is genius...
Hell, just typing about it makes me anxious to play it again.