RPG Games that I should play first

It seems that I need to own all of them to vote. They are very different. Expeditions is party tbs with few rpg elements. Rise of argonauts is action adventure with very few rpg elements. I haven't played Risen 3, and I don't like Two Worlds (maybe I should give them more time). The only games worth playing from that list, from my point of view, are Expeditions and the Gothic games (and if you want to play an RPG, Gothic is what you should go for).

PS: From your library, I'd play: Drakensang, Deus Ex, Dragon Age, Mass Effect and Arkania.

I don't have all of these but I'm really enjoying Two Worlds II so far.

Gothic 1 & 2

Gothic is is good oldie, many factions to choose and free character development

Funny, I have a lot of those games, but can't vote in the poll because I don't have the right editions....

Anyways, I personally liked the Gothic series a lot, though I haven't played the latest ones yet.

You don't list the Elder Scrolls series, which I think is also great, though again I haven't played the latest.

It's an MMORPG, but I still have to throw in Lord of the Rings Online, as I think it's an excellent game that balances a lot of things well.

Two Worlds 2

I think you should play Guild Wars 2. The base game is free since 29th August.

I didn't play all of them but I want to say one thing. I was deeply disappointed by Risen 3, in my honest opinion it was overrated game based on the hype built with the previous two, I didn't like it at all, I didn't even have willings to complete it due to awful story, awful combat and really boring gameplay.

I'm sad that you don't have Witcher 3 in your library, as this is the best RPG I ever played. Consider starting from gothic then, it's a good title that won't disappoint you.

Gothic 1 & 2 & 3
Morrowind is also good (my personal favorite from the TES series)
Sanctuary RPG is decent, it takes some time to get into though

No TES or Witcher series ? Your loss =)

Expedition:conquistador
Rise of Argonauts
Two Worlds 2 (maybe with the first one also)
Gothic series (with arcania)
Risen series

And then play TES>Dragon Age>Witcher>Divinity Original Sin

This shoeld take you a year or two =))))

Let me suggest you Gothic 2! :)
It's a great game and I had lots of fun playing it years back. If you don't care about graphics (well guess you shouldn't even play Gothic 2 then) you should also try Gothic 1. But the second one is my favourite :)

Have you considered:
Last Remnant - yet to get this one, but i hear its great.
Witcher 1 and 2 - yet to play those, damn backlog
Mass Effect 2 - might be best out of 3, depending on personal preferences. All in all epic shooter/rpg in space.
Rune (as much rpg as Rise of Argonauts imo, both are more like tpp action game, but still rune is great)
Saints Row 3 - very funny, enjoyed it more than any gta, if you can forgive side activities being kinda weak.

Planescape: Torment. Old, good character-story-driven RPG.

I like to recomment Spiderweb software to RPG lovers like you. (turn-based tactical fighting, not action)
http://store.steampowered.com/search/?publisher=Spiderweb%20Software

Do yourself a favour, play Path of Exile, its free, and it is the best, imho.

Mass Erect

I have 3 suggestions:
The Witcher
The Witcher II - Assassin's of Kings
The Witcher III - The Wild Hunt

It's the best modern RPG I have ever played.

Gothic 1/2
Dark Souls 1/2
The Witcher 1/2/3
Dragon Age

i would only play risen 3 since i don't like the others.

stuff that you don't own: witcher series, baldur's gate, mass effect, elder scrolls series.

Risen series if garbage, don't play them. That includes Risen 3.

Two Worlds 2 also sucks. Don't play that either.

I have no idea about Expeditions Conquistador. I guess it's nice if you're into this short of games. I'm not.

Gothic is ok, but I personally wasn't a fan.

Rise of the Argonauts is what I'd recommend you, but be aware of the fact that it isn't exactly an RPG, but an action-rpg. The fighting system is completely real time and combo-based, very of God of War-like (spectacle fighter game), but it does have a lot of talking and interacting. But what's really interesting and unique about it is the character leveling up system is religion based. You gain favor with each of the 4 gods for whom you have praying altars on your ships and when you gain enough favor from one of them, you can pray to him and receive abilities in their areas of expertise: special defensive maneuvers and smacking people with your shield for Athena, as well as water magic, if I'm not mistaking, healing magic and spear fighting for Apollo, sword fighting, agility based combos and air magic for Hermes and destructive fire magic combined with brutal mace fighting for Ares. What's even more interesting is that it has a dialogue system similar to Mass Effect, which was a big deal at the time and you gain favor with the 4 gods by choosing the conversation options that best reflect their respective virtues: bluntness, courage and brutality for Ares, lying, subterfuge and negotiation for Hermes, intelligence and wisdom for Athena and blind righteousness for Apollo. Problem is that they kind of fucked this up by indicating exactly which god each conversation option will grant favors with, Thus not giving you the chance to think for yourself. Annoying, I know, but you can overlook it. All in all, it's a really easily overlooked and underrated game that deserves to be played. It has some problems, but it's worth it just for the leveling up system.

Expeditions: Conquistador was amazing.

Here, have something random: Divinity: Original Sin. It's a turn-based RPG. Sounds boring? It isn't. Check it out!

Expeditions: Conquistador is high on my play list so please share how it is once you are done playing :D.

As for suggestion, the RPGs that we both own are the same that we both have yet to play unfortunately :/. Best of luck to you :D.