This question is a bit biased toward the subscription era of MMOs, but I think it still has some relevance given just how many MMOs still have at least a hybrid sub, right?
I suspect for me it’s EverQuest; that would’ve been something like 2.5 years, and while I took breaks, I don’t think I stopped subbing until I was done and moving on to Dark Age of Camelot. I have a lot of MMOs that lasted a year or two for sure, and several more like World of Warcraft, Ultima Online, and Star Wars Galaxies, to which I’ve subbed repeatedly for far longer – but not all in a row. Lately, of course, it’s been Lord of the Rings Online collecting my sub money, but it’s got a long way to go to dethrone the original crop of MMOs.
What’s the longest time period you’ve ever subbed to a single MMO, all in a row with no breaks at all?