Action RPGs:
First: Oblivion
I remember Oblivion being my first action RPG and being blown away by it. I had never seen anything like it before (this was before my house got the internet, so I didn't know much about genres, other games and such) and instantly fell in love with it. It more or less constructed my passion for action RPGs. Sadly, it doesn't hold up today as a very good game. Not unless you mod the fuck out of it.
Favourite: Gothic II
Tough choice, but I think I gotta go with Gothic II. Oblivion developed my interest for action RPGs - Gothic II solidified it. I remember it quite clearly, my mother came home with this $9.00 game she saw in a bargain bin and thought I might like it. Rather random, but okay. I played it, hated it at first and put it away. However, because it was a gift from my mother, I wanted to like it, so I put it back in and gave it a second chance.. it didn't take long for me to understand the greatness that bursts forth from this game like ash from a volcano. Needless to say, it became my favourite game of all time and I'm confident that it still is. I played it many, many times and recently I did a "hardcore challenge" run of the game where if I die once, it's over. I beat that challenge, so that alone must be testament to how much love I have for it.
History:
After Gothic II, I got Gothic 3. Well, my PC couldn't handle it for shit. I don't know how many FPS it had, but it ran slow as hell. And you know what? I still muscled through it. More than once. In its straight out the box buggy galore. Somehow, someway, with a great deal of patience, I enjoyed the fuck out of it. It wasn't long after that that I got the first Witcher. It was still new at the time, and I hadn't heard anything about it (again, no internet) so it was a completely blind buy at like $70.00. Well, it too ran slow as shit on my PC, but again I muscled through it and enjoyed it quite immensely. To this day, Geralt now remains my second favourite character in fantasy, and my favourite video game character of all time (the books are rather good too).
At some point after this, I got a much-needed PC upgrade and could play these games much smoother (Gothic 3 still lagged like a motherfuck, but it was at least playable now). I got the first Risen sometime after and enjoyed it for what it was, though it was no Gothic II, it was still a very solid game. Witcher 2 then followed to blow me away and further confirm my love for Geralt and the Witcher world. I believe Skyrim was next up and that really impressed me. I was expecting a mess of a game at vanilla, but bugs notwithstanding, the vanilla game was very solid. I prefer the more focused games of Gothic/Risen and Witcher though.
Risen 2 disappointed me. I wanted to love that game, but alas, I'd only consider it average. There were some good things in there (setting, aesthetics, 1 vs 1 melee combat once you have some skills) but it was extremely clunky and unresponsive, even for Piranha Bytes standards, and the early game was a fucking mess. Not to mention some of the very serious bugs and the weak storyline. Well, some of the characters were alright (in true PB fashion, most of the better characters were the many quest givers and support NPCs, rather than the main cast). Anyway, it overall disappointed me, and I really hope this does not spell the beginning of the end for Piranha Bytes, who alongside CD Projekt RED are my favourite developer.
I then played the entire Mass Effect trilogy back-to-back after the massive ending controversy. I'd never really heard of the games before then, and I was curious. Before then, I had no interest in sci-fi and astronomy. Now, I have at least a moderate interest in those subjects thanks to these games. Now whether you would even consider the games as RPGs or not, well that's another debate, but I enjoyed them for what I consider three good crossover action shooter/action RPG games. I have since played through the whole trilogy again for a second run and enjoyed it just as much.
Also around this time I got Gothic 3 back out, after another PC upgrade, and this time I modded it a bit. Community patch and a couple of smaller quest and content packs, and they, together, transformed the game into a hugely playable state. It was vastly different than the laggy and buggy vanilla state I remembered years ago. Massive props to the modders there.
After that I embarked on a bit of an old school historical journey by buying Baldur's Gate, Fallout 1 & 2, Planescape: Torment and IceWind Dale, but seeing as they aren't action RPGs, I won't talk about them much other than I've liked what I've played so far.
Well, now here we are creeping up to the end of 2013, and I'm waiting anxiously for Witcher 3. I'm also excited for Risen 3, as I'm interested to see what PB does. I really, really hope they do well this time and nail the game I know they still have in them.