OMRPG Serenia Fantasy
Gameplay: it's an RPG, repetitive. As an online game, it doesn't leave itself much room to experiment with mini-games and tweaks in the mechanics. I enjoy item hunting, but that is also repetitive.
Mechanics: point-and-click... no further interaction. I don't know how many ORPGs have an auto system, but you can setup your character to automatically attack certain creatures (usually this includes Elites but you can disable that... unfortunately, if you're hunting Elites and there are normal monsters near, there's no way to tell your character to distinguish between the two), usually there are links in the quests that you receive which by clicking on them cause your character to not only attack automatically but travel over long distances to the location where the monster can be found. Certain skills in your arsenal are usually used automatically too, but I have yet to understand how that system works.
Events: I'm not yet at a high enough level for "true events" but I have engaged in a side adventure called Instance multiple times. Since I have no allies yet, I use an auto-party to survive the aggressive mass armies and the LV60 boss at the end.
Quests: Pretty much every quest leads to a new one. Then there are "Daily Quests", one list requiring you to speak to the Quest Agent, and another list which exists on your daily reminder board.
Avatar: Costumes can be found rarely (I joined because I heard of a Cloud costume), and you can choose whether to show you're wearing it. There's apparently a costume that allows you to appear Naked as I've seen at least twelve people or maybe it was the same two people repeatedly. At level 20, (after approaching a Crusader Marshal in the Imperial City about Instance) you can obtain a mount which is also an optional display. Early on, you obtain the ability to take on Spirit forms of various monsters by hatching Spirit Eggs (usually these hatches are unsuccessful but you get two free ones to start). You have no access to your regular arsenal of skills while in these forms, so sometimes, it's just a costume, but you have access to the monster's skills so you can still attack sometimes.
Obtaining Items: I've mentioned the hunting/gathering, but many items you obtain through quests along with EXP, Gold, or Talent points. There's a crafting system also (I've always enjoyed making my own stuff like in Star Ocean, Castlevania, Rogue Galaxy, etc) not only for making new items but for upgrading the original version.