Medieval fantasy mmorpg wanted

Hiya guys
I'm tired of seeing tons of reviews and gameplay vids on youtube. So please help me with this.
I would like to play a mmorpg like this:
- Sandbox openworld universe, the biggest it be the better.
- Medieval fantasy universe.
- It should allow you to collect loot, little treasures and that stuff, which you can sell to earn money so you can improve your equipment.
- It should be pvp and pve as well.
- It may have a background story or not I don't mind.
- It should allow you to gain experience and grow in time.
- It should be free to play as much as possible, I may pay some money to buy expansions, kits, packs etc, but after spending a good time exploring and playing it.
- Not turn based or point to click gameplay, I find them predictable and boring.

Games I've tried (and discarded)
- WOW. The story is fantastic, nice gameplay, good graphics, but... very expensive.
- LOL. Nice graphics, nice combat mode, but pretty hard to gain level and... too much people that REALLY SUCKS!
- Albion online. Nice loot mode, good ish graphic, but too much coop features, it's okay to play and grow in groups but I like to explore and fight and earn things by my own and... not free to play.
- Entropia Universe. Spectacular graphics, nearly endless open world, but your life is like a prehistoric man from 28th century: You have to kill tons of animals with lasers, and collect tons of trinkets to get a low-Q weapon. So you spend 9/10 of your time trying to get resources... and it's scifi not medieval fantasy.
So experienced mmorpg players... suggestions please!!
Thank you very much