Kind of a runoff of the thread about: what people love/hate on DMs. Hopefully it serves it's purpose of: helping each other understand what makes a good Adventure/Rpg.
Personally what I like about (some) Rpgs in Blockland is: When the world isn't too big for the amount of content inside it.
(The slopes, 2 houses spaced wildly apart)
Detail isn't very important, your buildings and landscape should somewhat resemble what you're trying to make. It doesn't need to be perfect though, just as long as you get your vision across.
Bots are a nice addition as well, though it looks kinda silly for them to just 'appear'; this problem lies mostly with the enemies.
I really don't like when: you buy a weapon or item for a somewhat high amount of currency, then end up dying and losing the weapon. (Keeptools people)
I'm fine with losing it when I reconnect, just as long as I can keep my currency.