Well then. First off, goddamn invasions. I don't really bother with that stuff, but I decided since I had a ton of humanities I'd go ahead and kindle up the bonfire before Seath. I kindled once, and then BOOM, instant invasion. Cost me an extra humanity. Honestly I probably could've beaten the guy, but I've never done PVP before and let myself be completely careless and got taken down. Oh well. I did manage to kindle up after that at least, so it only cost me a single humanity more than it should've, and I've got like 25 normal humanities plus a number of twins.
Also, Seath is apparently the first of these lords (and honestly one of the first bosses in general) where hugging close to him is a BAD idea. Got killed and cursed, and realized I probably should've gone after that thing in the cut-scene. Sucks that curse sticks around after death, as I only have one more purging stone after healing myself. Also, I better be able to melee this jerk effectively! I've come this far without needing any magic, so I don't plan to go back and grab any now!