It's probably already been suggested before, but something for specific professions would be pretty cool.

Although it would inspire some to chain drop professions just to scoop achievements, there could be dedication achievements like "Learn XX enchants" or "Learn how to perform XX enchant from a dungeon" for enchanting. You could even have dedicated profession achievements like "Keep X profession for Y days."

We definitely plan on doing profession achievements but as part of our Account achievements for the very reasons you mentioned above. The last thing we want people doing is maxing and dropping professions soley to get achievement points.