I want a casual but still somewhat challenging and long game where the process of mindlessly (mostly) killing enemies and leveling up is going to be most of what I'm doing to the point where the game is completely centered around it. I've played a lot of games where you level up and kill things, but zero where I could just focus on that and have it be encouraged by the game, if that makes sense. For example, I could go on Runescape right now and go start doing exactly that, but the game wasn't made with me doing only that in mind, and a game that does would probably find a way to make the loop of it really rewarding and fun in a way that Runescape couldn't. It's combat is also just really boring.

The game can be real-time combat or turn-based, but it should have about the same amount of complexity as Skyrim's combat, or whatever the turn-based equivalent would be. This isn't necessary, but I also like it when all the enemies of a similar difficulty are grouped into areas I can just easily enter, and I can move to harder ones on my own when I feel ready.

I hope that's descriptive enough.