It's between Suikoden 2 and Baldur's Gate 2: Shadow's of Amn/Throne of Bhaal.

Both games are of the highest quality, have perfect gameplay, have excellent music, have some of the most memorable characters ever and offer massive replayability and continuity from the original releases.

The stories of both are hugely deep, which is really what you're looking for in an RPG. Both stand out, for me, as the finest games... Ever.

Ocarina of time...still remember when I was like 7 years old and my brother brought over the game and I was HOOKED, he always never helped me, but I prevailed through the water temple and everything else, I actually replayed it countless times as a kid... beat that game as a kid and it's still my favorite as it holds a special place in my heart =D

Xenogears. The most complex and interesting story in a videogame I've ever experienced. I really wish they would've turned it into a series.