I bought the CE Imperial Edition of ESO, the 2 dlc and also subbed every month since release on PS4. I have bought mounts, costumes and pets too. I seriously need to stop.
I don't usually buy dlc or season pass in games. Although this year seems to be the exception. I bought the Gold Edition of Assassin Creed Syndicate and the Juggernog Edition of Black Ops 3 that came with the season pass and Witcher 3 Wild Stone from Gamestop that has the cards included. (I should have waited since it's on sale for $14.99. I lost my receipt, other wise I would get price adjustment.)
Other then that, I can't think of anything else other than what I mentioned. But yeah, I have spent the most in ESO.