A while ago, I did a post like this for BG1 and SOD, so I decided it would be fun to make a similar one to that and sharing my experiences with the end of the Bhaalspawn saga.
Due to Reddit's character limit, I linked my reviews above.
For the TL;DR:
BG2 is practically everything I enjoyed about 1 but better, with much more dangerous and interesting encounters, and many exotic places to explore, Irenicus is also a great antagonist, with interesting motivations and presence, the only thing I kind of missed about 1 was the "humble" low-level adventuring vibe and the overworld exploration aspect of it.
TOB was kind of a mixed bag for me, some of the encounters were great, but it was pretty rail-roaded and the story was kind of weak overall, I consider it the weakest link in the series besides SOD, it wasn't bad by any means and I've seen much worse finales to great sagas, but individually its kind of messy.
Anyway I'm not completely done with the game, since I wanna go for 100% like BG1, but I'm going to play something else as a palate cleanser.
Edit: Typos.