Affixes are fairly important parts of weapons, with some like enchanting making them considerably more useful, but I have no idea how I’m supposed to know what they are when deciding on whether to buy/craft a weapon.
I’ve been looking for some kind of list for a while, but I’ve found nothing that actually lists the affixes. The closest thing would be this: Weapon Table - Gems of War Database, but it only lists one per weapon (while there are many that have multiple useful ones), and in a very imprecise way (“generate mana” could be a lot of things).