The old clone system. Where you had to have standings to install a clone in an NPC station. Or you could temporarily join Estel Erador (can’t remember the spelling), and use their standings with all NPC corps to install your clones. But they were usually wardecced, so you had to watch yourself and not get careless.
Also, you could lose significant SP if you forgot to upgrade your clone.
Also miss the old Aura, and how she would laugh at you when got podded and woke up in a new clone and say, “Oh, you foolish pilot!” That’s when you knew you’re weren’t playing a cartoony kids MMO like the other ones.
And last, I miss the gambling sites, especially EVE Bet. Not CCP’s fault they had to eliminate them. But watching NHL hockey or World Cup futbol was so much more interesting when you had some ISK riding on the outcome.