I know a lot of you guys have played it multiple times, then I only played it for that. For a few months after it had come out. I was pretty hardcore on it, and as stated before was trying to be as through as possible, looking in the every nook and cranny, but there's probably a ton I just do not remember, and I'm sure there's lots of stuff I'm sure I probably missed. Plus there's the whole back half of the game that I never did.
I was working my way up to volcano Manor, and never went to where the other tree deal is with Malenia, nothing in the snow fields, and that dragon Sky place. I was also saving the sewers in the capital, because I was pretty excited about going into there, because I read it supposed to be a pretty cool place. I think there were quite a few just dungeons and things like that also didn't complete because I just wasn't good enough for didn't have the right gear at the time.
The goddamn game is just huge. The one thing I wished was implemented is that there was some sort of tracking system, and I think I bitched about it in the past that you don't have almost a log just to confirm that hey you've gone and cleared out a cave, don't bother going there again. That's probably the biggest reason I'm leaning towards a new playthrough because I have no clue what I had worked on, and what's been cleared out already, just a vague recollection of I didn't do these big areas.