Below is my 10 favorite games of all time. Each game has a video I linked that are a sample of great moments in the game I experienced.
Feel free to share your top 10 also.
Zelda: Orcarina of Time - Game introduced me to the open world fantasy I always longed for, a true adventure.
Dark Age of Camelot - First encounter with a full 3D Fantasy MMORPG. Meeting people here alone has memories. So many realms to explore you could easily get lost.
Elder Scroll Series - It amazes me that a series could be so consistent in delivering a quality RPG experience. Truly captivating with the music and environments.
Mass Effect Series - The emotions from playing this game still stay with me today. A SCI-FI RPG that caught me off guard and I fell in love with its characters.
Diablo 1&2 - Dark medieval RPG that you could put countless hours into. The challenge and buildup of your character as you faced Diablo alone is unprecedented.
Fallout 3 & New Vegas - Post apocalyptic fantasy that caught me with surprise. The world made you feel like you had to do everything in your power to survive. Upon leaving the vault you realize what you got yourself into.
Kings Quest: Mask of Eternity - I credit this game as the reason I love Fantasy RPGs. It is lower on the list that is only due to the game play hours I got out of it. Traveling the realms on a crucial Quest keeps you playing.
Rome: Total War - Micro management, huge epic battles all in a Roman theme really got me into this game and it was epic.
Dragon Age 1 - Like Mass Effect this created an awesome emotional attachment to the characters. Who knew spending hours in a camp talking with NPCs would be so fun.
Day of Defeat - Before there was Call of Duty there was DoD. Spent countless hours living in WW2 battles fighting real opponents.
Honorable Mentions: Dark Souls, World of Warcraft, Grand Theft Auto Series and Runescape 2D.