I liked a lot of the BG I characters, probably because most of them were derived from table-top games that the developers played, and so they were pretty well thought-out ahead of time. I have seen a scan the original character sheet for Minsc on the internet ... from James Ohlen maybe?
One of the great things about BG I NPC's was the dynamics between pairs, like Khalid & Jaheira, Montaron & Xzar, Minsc & Dynaheir, Skie & Eldoth. That type of pair-connection was mostly lost in the BG II NPC's. In terms of good alignment, I think it would be very interesting to see a pair of NPC's who have very different alignments, one good, and one maybe not-so-good.