Couldn’t find a good Pokémon T.I.L. (Today I Learned) picture, so just going with this instead:
Just wanted to state that despite being in this community and learning a lot already, there are still new Pokémon related things I learn on a weekly basis. Today for example, I learned that Reverse Holos of Holofoil Rares from the E-series have a yellow E at the bottom-left corner; and Reverse Holos of non-Holo Rares have a blue E instead. 
EDIT a week later: More things I learned.
Greetz,
Quuador