Meet Goldsink. I mean, Lexicar, my priest. I rolled Lexicar for one reason and one reason only: I think Priests have some of the best looking tier sets and I wanted to collect a bunch of them. =D But, being interested in making gold, of course I couldn't have a character with no professions. For 90% of Wrath she was Alchemy/Herbalism. Near the end I dropped Herbalism for Blacksmithing and powerleveld Blacksmithing to 450. Painful on the bank, but it eventually paid off.
Now the facepalm: When training Azeroth flying on her I accidentally double tapped and bought 310% flying as well. Q_Q Anticipating my druid not being able to herb in Cataclysm for a while, I bit my lip and dropped Blacksmithing and trained Herbalism 1-525 in one afternoon. Ouch!
Now for the coup de grâce. My herbalist leveled faster than I anticipated. So on Lexicar I dropped Herbalism and leveled Blacksmithing all over again, it cost me about 17,000g. I chose Lexicar to regain Blacksmithing as my only alt at 84.
I was feeling really bad about the whole process, having recently made a pledge not to spend so much gold on silly things. Now, though, I've decided it was a good decision. Since leveling Blacksmithing two days ago I've made 33,000g selling the Bloodied Pyrium set so I'm feeling pretty good about it!