To be honest, Jon Irenicus' real name is Jonaleth which is arguably a more 'cool' name for a villain.
My main love for the BG series might be some degree of nostalgia goggles, but also that you are slowly introduced to being a Baal spawn, what it means, what it means to people around you and how the world now perceives you. That mixed in with the Iron Crisis in the first game made it stand out, it started fairly 'normally'. Ok so my Foster father gets killed, I decide to meet his friends, they tell me of a Crisis sweeping the sword coast, we go down south, meet some more assassins along the way. We figure out that whatever we are is pretty valuable, we 'solve' the crisis, only to be introduced to a bigger mystery, that of the Iron throne. Now the rest of the game etc.
The second game kinda goes along the same formula, clearly Jon-Jon wants something from you. But you are never shown just exactly what until you arrive in Spellhold and by then it's already too late. The game lags a bit in the Underdark, in my opinion at least, before returning to Athkathla and your quest for vengeance/to restore Imoen's soul, after which you figure out just why Irenicus needed your soul, I won't spoil that much for you.
ToB is basically, "Talk Talk", Fight Fight, all the way to the end, it was a low-point of the series in my opinion, I would have liked more talking, then again I love Planescape Torment so maybe it's just that.
Also, playing right now:
Crusader Kings 2: I am now King of Ireland (and Duke of Brittany (thanks pope!))
Modern Warfare 3: Doing spec-ops with a friend.
Skyrim: Mods Mods MODS!