I recently got the Artorias of the Abyss add on, and I'm loving it so far! When I first entered the sanctuary guardian boss fight, I was freaking out because I was in unknown territory for the first time in a long time. Then, when I was exploring the eerily familiar Royal Woods, I stumbled upon the Artorias fight by complete accident and started freaking out not knowing what to do. Needless to say I died countless times. Then I met the black dragon and was roasted alive. I decide I'd save Kalameet for later, and am now stuck on the Manus boss fight. DLC is awesome!
although, my first go of bit is in NG+, so it's extra hard!