Late 20s you need to revisit all the shit you didn't like before, especially moldy cheese. Sweet starts to suck a bit and bitter gets good.

Also not sure if it's my addiction but black coffee is amazing. It's an acquired taste and most people go milk and sugar - > milk - > black. Green tea, black tea, mushrooms, spicy, wasabi, mustard, strong gouda, grana padano and so much more are all so good.