Had this issue with Dragon Nest. Loved the game. Was fun and fast, played like a fighting game with how responsive the controls were and addictive the combat system was. Sadly, you have to buy bag space with real money, and if you want to do any kind of progress later in the game, you have to spend tons of money on scrolls to keep yourself alive, and special items that keep your items from breaking when you upgrade them. Korean mmos all try to rob you, and it's sad because the game's can be really fun if not for the cash grabs. Nexon just ruins games, they're pretty much doing the same to Vindictus.
I play League of Legends a lot. It's pretty much the only free to play game out there that isn't pay to win, at all, even in the slightest. Everything can be bought with ingame points, and they're not even hard to get. Everything but skins, and that's cosmetic anyway. You get a ton of champs for free to play per week, etc. Just depends if you like the playstyle, which can be really deep but unforgiving since it's all a team game.