One thing I found interesting in the game is that you can steal off Delma's brother, right at the beginning, one of her best weapon upgrade.
Other stuff I remember (pretty much all I remember)
Darc has an awesome super move.
Ganz is always the last one to act and that makes him kinda suck.
Maru hits like a truck for a good while and pretty much always acts first (+Great Hunter funnies)
Camellia becoming a super hottie
The last boss is called the great darkness through the whole game. JUST before the last dungeon (point of no return) there's a merchant who sells you darkness resist accessories and damage+ to darkness weapon upgrade. I am by far the most retarded gamer to have played AtL:TotS because I didn't buy a single one thinking they were useless. Then I get to the last boss and I'm like "Why is he hitting me like a truck and I'm doing so low damage?"