There are so many over the years. @butchdawg32, The 1st Ed jungle one was phenomenal. The worlds threads are always great. Especially 2019 with the imakuni signing. The old tournament threads from TMB, Kamex, and Lizardon Mega Battles. E4 really has become the central source for detailed collecting information. Whenever I goole something, it takes me to an E4 post. 
Oh and the Snap Contest was also a blast. Secret Sant threads as well. Those and the Snap contest felt magical!