One advice, take your time with the game, don't rush to finish it, because once you get to a new game+, even with a 120+soul level and the highest equipment, you will still find yourself in a tight spot.
So true I am like level 50+ and you can still die from the normal enemies from the firelink shrine, What happened to me in the last two days is this
Went to the forest to level up killed all those spirits except the thief one keeps showing up and the monks with the magic, mace,and axe,shot a talking cat because it annoyed me got my ass kicked by a giant wolf with a BFS for who knows how long, upgraded my weapons, ventured into the sewers just to get cursed, went back into the sewers and saw the big ass dragon and used that white stick that brings you back to the last bonfire(scared the crap out of me) went back died and fought it again wining this time got the key to blighttown and took a leap of death when I got there, went again to die this time returning to the firelink shrine just to find out that the fire soul keeper has died and now the main bonfire has died out. Not to mention that my game has been invaded in the pass two days with me dieing only once.
So yeah Dark Souls one heck of a game and that's just two days
Also
Rage Quit : Dark Souls