Seeing that character growth while playing through the Trilogy is incredible, and no other game ever managed to achieve something like that, imo.
17 innate abilities. Whereas I only started with three in
BG1.
Bhaalpower/Class ability/Thief HLA/Quest
Eilistraee's Chant (gives everyone Tenser's Transformation for a while, is a ability that comes from a mod, it's pretty OP, so I never used it)
Danger Sense, Evasion, Healing Touch, Cure Ailments, Divine Might, Greater Evasion, Avoid Death, Set Traps, Charm Animals, First Strike, Poison Weapon, Regeneration, Scribe Scroll, Dark Taint, Slayer Form, Pocket Plane
Party Formation
Jaheira as
support/disabler
Imoen as wizard disabler
Minsc as frontliner
Aerie as healer/disabler/buffer
Mod NPC
Iylos (great mod) as ... uhm ... monk