There's Bakura Ryou, Yami Bakura and Thief King Bakura. The last possibly being the arc you missed :)

The anger issues go along with the revenge obsessed Bakurae and the fact that his parents are deeaaaad. And this Bakura goes for the fist fights since he's not in Domino any more :) Or possibly going for the "scare the shit out of the twerp" route and summoning his giant snake monster. Whichever causes less long term damage :D