I used to be into PC gaming in late 90s and early to mid 2000s. Since consoles have finally upped their online efforts though the simplicity of console gaming has made me forget about the PC.
What I probably miss most is the communities, on various games communities would be built around a dedicated server, you'd get to know the regulars and admins would smite the troublemakers with banhammers. You just don't get this on consoles, no servers to build a community around, no admins to keep the games fair and fun. Just random people constantly and a good half of them are asses. There are so few games that have large player counts also since few companies want to even give an option for dedicated servers or even chat lobbies and go the blind matchmaking P2P route.