I find most foods are best as soon as they are made, but some things seem to get better when the flavors have more time to meld. The only two I can think of right now are chili and hummus. What other dishes am I forgetting, or haven’t tried that you think get better with a little time?
Chili is much better the next day. There’s even a chili restaurant in Virginia that makes their chili the day before, refrigerates it, then heats it back up specifically because of this (the name of the restaurant escapes me at the moment, but I used to love going there).