I'm an L-theaninemaxxing teachad now. I have like 8-10 small bags of various looseleaf teas. What is the best type of tea?

EDIT - My collection currently:

  • Vanilla Roibos (herbal/Roibos)
  • Coconut Hibiscus (herbal)
  • Chamomile Medley (pretty sure this has chamomile, lemon grass, spearmint, and maybe some other stuff) (herbal)
  • Coconut Oolong (Oolong)
  • Moroccan mint tea (green tea)
  • High Misty Mountain (not sure if this is oolong or green, but it's good)
  • A chai mix (black tea, this isn't good, I shouldn't have bought it)
  • Assam Breakfast tea (Black)

I just finished up a chrysanthemum ripe puerh tea yesterday.