My Top 10 (Not in any particular order):
Final Fantasy 4 (SNES) - One of the first games I played when I finally bought a SNES and definitely one of the best ones on the console at that time. Always holds a permanent spot on my top 10 due it's involving story and characters. I loved that it showed "meanwhile" in between chapters showing what the evil people were doing on their side. I have always wanted to make a spinoff of this playing the evil side. The first time you're betrayed and the first time you shed your dark suit. Those are the kinds of things in a game that burn into your mind.
Planescape: Torment & Icewind Dale (PC) - Combined these two because they're equally good for different reasons. I like all the infinity games but Planescape: Torment gave a unique story/atmosphere and Icewind Dale was more open than the BG/BG2 games.
Mines of Titan/Mars Saga (PC/C64) - One of the first graphical sci-fi rpgs I played and definitely sticks in my mind to this day. It was short if you knew where to go but, it allowed for some decent exploration. I liked that it had an option for automated or tactical combat and the 'leveling' system I haven't seen again since even though it was pretty decent.
Wizardry V: Heart of the Maelstrom (SNES) - The hours I spent just making characters in this game is beyond ridiculous. I remember going back to it countless times trying to make the ultimate party. Had no real story to speak of unless you read the material but the dungeons were nicely laid out and had that eery feeling missing from dungeon games nowadays.
Lunar: The Silver Star (Sega CD) - My first and only Sega CD game (I think playing this too much killed it). Such an epic game in terms of length and story. This would be the top game for me if it weren't for the stupid flying cat voice overs that I mentioned in my previous post. It was also the first console rpg I 'cheated' on to level up (Find a loop spot where you press against a wall on the world map and your guy runs back and forth, then hold down that direction, and hold the attack button..take a nap). Ah memories.
Circuit's Edge (PC) - While not the best game in the world, it was unique for it's time with sci-fi and chip implanting for skills. Extremely short game though if you've played it before it has almost zero re-playability. I just remember the atmosphere, story, hunting around for clues, and getting mugged.
Shadowrun (Genesis) - This is not even close to the same game as the SNES release. I still go back and play it now and then to do Matrix runs for fun. Definitely the best representation of the matrix idea to date..at least as far as RPGs go. Decent sci-fi implanting and upgrades. Decent Karma skill system. Alright storyline to keep you going. A little basic but it really doesn't hurt it. Null sweat, chummers.
Dragon's Age: Origins and DA2 (PC) - I'm one of the rare people that really enjoyed both but, lean a bit more to the 2 side. If you put them together, you end up with a decent gaming experience. Good combat and handling in 2 and good story and exploration in Origins. I can't really split these up because they wouldn't be in the top 10 if they weren't together.
Mass Effect Trilogy (PC) - The first time I actually enjoyed myself in a "fps" game. Like DA, I don't consider each one it's own game but just chapters in one game. Decent and compelling story. Alright characters and nice atmosphere.
Suikoden (PS1) - Really enjoyed the castle building aspect even if it was automated. I really like games that are like that..even to the point where I'll deal with crappy story/characters/gameplay just to see the place grow. Like Secret of the Stars (SNES) which would be here if Suikoden wasn't. It was a really crappy RPG but had great city building, an interesting combination magic system, and a secondary party you could switch to in order to solve puzzles or fight.
Honorable Mention:
Lufia & Lufia 2 (SNES) - Really loved the repeatable 1-99 dungeon in the one, the story in the other, and the monster feeding system. Cookie cutter game other than that. But, memorable and fun. It was also the first time I'd experienced a prequel rather than a sequel in a video game.
I know they're not all CRPGs but other people were sprinkling in some others too =P