Food or things? Even if he hadn't been considering the latter in that exact moment, it wouldn't be wrong. Rather than overthink it, the answer comes fairly quickly:

"Can't it be both?" Because setting aside things like learning more about this one human, or dealing with how slowly his limited cursed energy recovers on its own here, new experiences as a whole really are his favourite. "I've never been able to write my wish before, either. There's a lot I haven't done yet, so I'm grateful to this place for giving me the chance."