So far things I'd be interested in seeing:
- Potions, as traps or with creative uses (Possessed weapons vs rust dust? Poison potions as herbicide? A potion as a repellant that makes snakes wander away from you?)
- *Some* gardening aspect. I do need some permanent source of pine sap without having to burn down new herb groves. Perhaps Ricardo allows you to get some potted herbs for your cellar, which regrow periodically?
- An unlockable material stash in your workshop. Once unlocked, you get the ability to leave, say, 10% of any (or all of) your materials there. If you die after leaving that 10%, it appears in a chest in the cellar.
- Golems/elementals! I saw this mentioned by someone else lower down. Unconventional materials on golems would be fun (After all, why not? Why shouldn't I make a golem out of something sticky?). I know I wouldn't be too big on party mechanics though.