simple question but probably not a simple question, what do you guys think is worth crafting and why?

Blood Recipes
-Blood Weapon
-Blood Headgear
-Blood Armor
-Blood Gloves (cb)
-Blood Belt
-Blood Boots
-Blood Shield
-Blood Amulet
-Blood Ring (dual leech)

Caster Recipes
-Caster Weapon
-Caster Headgear
-Caster Armor
-Caster Gloves
-Caster Belt
-Caster Boot (manaboots)
-Caster Shield
-Caster Amulet (very popular)
-Caster Ring

Hitpower Recipes
-Hitpower Weapon
-Hitpower Headgear
-Hitpower Armor
-Hitpower Gloves (knockback)
-Hitpower Belt
-Hitpower Boots
-Hitpower Shield
-Hitpower Amulet
-Hitpower Ring

Safety Recipes
-Safety Weapon
-Safety Headgear
-Safety Armor
-Safety Gloves
-Safety Belt
-Safety Boots
-Safety Shield
-Safety Amulet
-Safety Ring

i would say caster amu and blood rings are the most important crafts in terms of fg boost

Selling crafting packs is the most profitable

I haven't gotten so far as to determining what every crafted item is worth using for every build, and for pvm and pvp. I guess that is a humongous job.

For my part, i start crafting as soon as i find the items to, and early on also, you can actually craft (and gamble) quite good rings and amulets for early use if you run through the game on your own. Good resistances, life bonuses and such. And they're nice to give to newbs too if they become redundant.