Resource Spawning: I'm a fan of choke points in PvP, as long as there are small quantities spread around so mats can still be gathered by the weak & the lonely
Harvesting: Please don't make it take too long, just long enough to sneak up from behind and back-stab.
Harvesting Tools: It depends on how much storage is available, whether this makes sense. I don't want to have to leave my harvesting tools at home just so I can go out and fight. By the same token, if weight & encumbrance is a factor, we will have to pick & choose who carries what when we go out reaving.
Inventory Management: In most MMO's, I have to have several accounts with max characters to allow me enough storage and specialization for all the mats needed. I like ESO's method of having a cottage with lot's of storage chests / shelves / crafting areas so I can work on different things all without having to travel all over the virtual world.
Recipes: Standard scale for recipes works for me. Common thru unique, each with commensurate rarity.
Hauling Resources: SchweinHerders FTW
Refining Resources: Always a mindless task, can't the thralls do this for us?
Crafting Mini Game: Anything to add variety to crafting in an interesting way is a good thing.
Mass Production: Thralls
Profession Interdependency: Yes, without making it so burdensome that you can't make anything without a huge list of other crafters willing to work with you.
Completed Goods: Thralls
Enchanting: Place orders via thralls and let us enchant & give back to thrall. Customer can pick up when it's ready, with an in-game notice of some sort.
Decay: Yes, to an extent. Enough that you would probably want to get your kit fixed on a regular basis, until it's time to replace it.
Repair: My dad once told me that the best you can hope for from a fight is sore knuckles. Even if you win every fight, your gear takes damage.
Vendors: I like having my wares available via a vendor. I also like the ability for a vendor to represent the crafters in taking an order, then the order sent to the thrall, who works with the crafter. Once complete, the finished goods go to the thrall or vendor for pick-up by the customer. Prepayment should be part of this if it is implemented.