I'm not a very big fan of Harrison Jones since the fiasco that was most of Uldum's quest-chain in Cata. I think the character is a fine as a send-up of Indiana Jones and all that, but I think his use should be limited to a handful of quests and definitely at a once-an-expansion kind of level (or confined to Archaeology quests, perhaps). Having him reappear multiple times in a zone, and having large set-pieces of the various "Indiana Jones" movies replicated in-game, that was just too much in my opinion.