Domo's great. All classes were interesting and stood out their "feature" especially when in teams. I have to admit though, level grinding was quite boring. Still, AoE teams made that a bit easier. Some people would duo, and tbh if I found more partners I would've leveled quicker. But that's just the community; and despite what felt like slow leveling, people still eventually came back. One thing I did love about the gameplay though was Alchemy. Alchemy made gearing a lot easier, and it's usually obtainable at your level.
What made Domo great was that it's a very casual game. I know a couple people who just chat with their friends more often than leveling. I always had Domo up just sitting on the side while I do other things like watch a movie on my comp. Aeria made it even more awesome by allowing players to keep 2 windows, so long as neither are doing the same thing.
It got even better when everyone found out that costumes are permanent and tradeable, even after equip. Not only that, but costumes weren't outrageously expensive where it feels like it would take an arm and a leg just to obtain one. Most costumes weren't even in the millions, and some were very cheap at about 250k tops. I manage to get my costume very early, and I was just leveling and selling mob drop items.
The only problem was just content. There were basically no updates at some point. I personally didn't feel bothered by it because if I got bored of Domo, I know I'll eventually come back. I don't know why either but I just do. I haven't really befriended people on other games compared to Domo. Some people I met really help out or I can help them, so we start to become good friends.
I do like Domo for the game itself, but not alone. I like the community too. People can pretty much gear you up to 40 no problem. Aoe teams existed considerably often. Prices weren't insane. Usually people who helped me are people I can rely on, and that goes pretty far.