About LOOT by killed enemies :
I'm on this moment level 9 and find loot by enemies:
1) Goblin hearts,
2) one time a body part for my creature (Rotten Goblin Legs)
3) and also 1 time an Axe. Maybe also sometimes a potion.
4) But after killing Penumbra (at level 9! Quest: Buad Blood) some goldcoints + a charms (+ 2 to Melee Protection) was the LOOT of Penumbra (not the quest reward itself, because that give me 1500 XP + 400 Gold (fixed) + one reward item I may choose)
Personal notes:
On this 2th playthrough (Xbox) on nightmare mode I
try to always FIRST kill enemies, than do quests (or do a quest, but not go for the quest reward immediately!)
Also: I have on level 9 now only 1 point spend on lockpick & don't take attention on chests, barrels etc too many on low level, but writing down all the positions of possible loot I come across (in the beginning this take some time, but afterwards I have the feeling my patient will reward me well

.
So many chests I must still open them!
Open them on a higher level : I wish to do a "test" to see how much better loot that will give my hero comparing to take early in the game 3 points in lockpick and open all chests I can find

!