Newb Begger SpeakingFollow

I think it really depends on the npc likely the classic zone npcs will probably yield more(ie trilogy npcs)

You need begging for BiC.
I got my begging to 190 by only using points at my trainer hehe.

I'm not sure how much aggro a critical failure produces but I doubt it's much. You only need a single point of aggro for a mob to attack so begging doesn't need to add a lot. Also, ironicly, the more often you use it as a taunt, the more skilled you become and the less likely you'll get a critical failure to produce aggro in the first place.

As I've heard it (i.e. take with a grain of salt), the Begging skill was originally put into the game back in its starry-eyed days of a role-playing game. However, free gold or plat didn't fit into the whole risk v. reward model and it was quickly nerfed down to produce a copper at most. I assume its use in the BiC quest pretty much follows SOE eventually using languages in quests; taking a previously worthless skill and making it useful under a few limited circumstances to reward those who took the time to train it up.