The climate, the climate of the game is the most important for me. A good example is Morrowind with all legends, remnants of a real dwarf race (the dwarves have disappeared under unexplained circumstances). Interesting tasks and quests. I really like developed economics, for example in EVE online, where I can buy EVE Isk and co-create alliances with other players. Of course, to pilot a good ship, you have to buy and use a lot of skill injectors, but it's nothing compared to how much you have to spend to have a large fleet in EVE Online
Building a fleet is ongoing, you have to get the right amount of raw materials, there are longer and faster ways to do it. If you want a longer way, it is best to send your tower ships to asteroids and let them copy the resources, there is a second way, but you need a lot of currency (ISK) for that.
Then you only have to trade with the members of your corporation and buy raw materials in exchange for ISK, then everything should be fine This is good advice.
In RPGs such as EVE, you need to buy ISK, if you are wondering where you can buy them, check here: buy eve isk
Best ratings, I am a satisfied customer and I recommend, especially cheap ISK