One of the most common questions I get as WoW Insider's (other) resident Auction House guru is this: What professions are going to be the best in Mists of Pandaria? Arguably, there's no absolute right or wrong answer to the question -- after all, each profession is going to have its pros and cons. (I like to hedge my bets by giving different alts different professions to have a max level of each profession.)
That said, one of my favorite professions for the early days of any expansion is alchemy. It's likely one of your favorites, too, and there's no mystery as to why -- transmutes. In the earlier days of Cataclysm, it wasn't rare to see Truegold sell for more than 1,000 gold apiece. That provided a small profit to any alchemist, but for those lucky enough to see bonus procs, a single transmute could turn a 4,000 gold profit or better. Not bad for about 20 seconds' worth of work.
Of course, that was then; this is now. Will alchemy remain as stupidly profitable in the early days of Mists of Pandaria? Only one way to find out -- ladies and gentlemen, it's time to datamine! To the beta!