For the main part... the discovery feeling from the beginning.
Unknown maps with no real idea of what we will discover, the difficulty we could have even in Brayflox, the CT runs with real strat and the challenge to skip the one shot timer, some people who left before CT3 release, the lively feeling in cities and mor dhona with people talking and searching teams, recruiting for FC, the fate trains, the feeling the time we invested had some kind of worth (Ixals crafts), the crossskills.
Now, everything gives the strange vibe of a permanent rush.