Heh, it’s funny how much our opinions can vary sometimes. In my head, Law School doesn't even come close to NGB, - not necessarily in terms of raw production quality, but definitely in terms of pure joy I get from playing it. I only played Law School once (one major playthrough) and haven't even gone back to redo my saves after '"the changes" in S1. There are certain aspects of that game that I find rather frustrating/annoying, and having Elsa around isn't enough to compensate for them.
At the same time, - I’ve played NGB 4 times from scratch already. I like pretty much everything about it: MC is actually decent (not a simp or an idiot), story is engaging (despite me usually hating college setups), and the visuals are solid (not my priority anyway). Most importantly, it has maximum player agency - no forced dates, no MC suddenly drooling over a girl, and no far-fetched drama just for the sake of it. The only negative I can think of is that main menu soundtrack, it's painful to listen to.
I haven't played NSL yet (it's on my list), and Sickimtrack is firmly on my blacklist

. I don't really have any formal AVN ratings, but I keep my favourites in my signature, and NGB definitely earned its spot there. I thiiiiink... it would be in my top-5 (I'm with Milton here).
Also, I'm 100% with you on Tegan - easily the best girl

. Speaking of Tegan, I have a question for "booty experts" here - does her butt look a bit bigger than usual in this shot?